EXHIBIT 99.1

(COMPASS  LOGO)

NEWS RELEASE

CONTACTS:

Rodney L. Underdown (913-344-9395)              Peggy Landon (913-344-9315)
  Vice President and Chief Financial Officer      Director of Investor Relations

                      COMPASS MINERALS INTERNATIONAL, INC.
                      ANNOUNCES THIRD-QUARTER 2005 RESULTS

         OVERLAND PARK, Kan. (October 31, 2005) - Compass Minerals
International, Inc. (NYSE: CMP), a leading producer and marketer of salt and
specialty potash, reported the following results today:

- -        Third-quarter gross revenues increased eight percent over the prior
         year, led by 28 percent growth in the company's specialty potash
         segment.

- -        Compass's net loss for the quarter was $4.4 million, or $0.14 per
         share, which is a 14 percent improvement when special items are
         excluded from the prior-year results. In 2004, the company's
         third-quarter net income was $5.5 million, or $0.17 per diluted share,
         which included an $11.1 million non-cash benefit from the partial
         release of the company's valuation allowance for deferred taxes.
         Excluding that one-time benefit and other special items, the company's
         third-quarter 2004 net loss was $5.1 million, or $0.17 per share.
         Compass typically reports a loss in the second and third quarters of
         the year when the company builds its rock-salt inventory.

- -        Compass completed the bidding process for the 2005-2006 highway deicing
         season averaging an eight percent year-over-year increase in bid price
         per ton. The company expects this price improvement to fully compensate
         for the upcoming season's higher transportation costs. The volume of
         Compass's 2005-2006 bid awards was similar to its bid award volume for
         the 2004-2005 season.

- -        The company voluntarily made an early $10 million principal payment on
         its term loan reducing the principal balance to $7.5 million.

         "The company continued to make value-creating inroads this quarter,"
commented Michael E. Ducey, Compass Minerals International president and CEO.
"We improved pricing across all of our product lines and we've successfully
maintained our margins despite rapidly rising costs and hurricane-related
transportation challenges. I believe that our results this quarter are a
testament to our focus on delivering shareholder value."

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Compass Minerals International
Third-Quarter 2005 Results
Page 2 of 9


                                FINANCIAL RESULTS
                          (IN MILLIONS EXCEPT FOR EPS)




                                                                THREE MONTHS ENDED            NINE MONTHS ENDED
                                                                    SEPTEMBER 30,                SEPTEMBER 30,
                                                              -----------------------       ----------------------
                                                                2005           2004           2005          2004
                                                              --------       --------       --------      --------
                                                                                              
 Sales                                                         $120.3         $111.7         $498.1        $459.1
 Sales less shipping and handling  (product sales)               86.8           83.9          350.5         334.2
 Net earnings (loss)                                             (4.4)           5.5           17.5          29.9
 Net earnings (loss), excluding special items                    (4.4)          (5.1)          18.1          19.6
 Diluted earnings per share*                                     (0.14)          0.17           0.55          0.93
 Diluted earnings per share, excluding special items*            (0.14)         (0.17)          0.57          0.61
 EBITDA                                                          19.1           18.8          105.3         103.1
 Adjusted EBITDA                                                 22.5           22.7          109.7         108.1
*Negative EPS is not diluted


         Salt sales increased four percent year-over-year to $98.2 million due
to a five-percent improvement in the average price of highway deicing salt and a
six-percent improvement in the average price of general trade products. The
company put greater emphasis on in-season sales in the 2005-2006 North American
highway deicing bid season and reduced its mix of discounted, early-fill sales
which largely occur in the third quarter of the year. This change in product mix
resulted in a seven percent decline in North American highway deicing salt sales
volumes in the third quarter and modestly higher commitment volumes later in the
season. This reduction in third-quarter North American sales volumes was
partially offset by increased sales volumes in the United Kingdom.

         Compass's North American general trade salt sales volumes improved on
stronger water conditioning sales and modest market-share growth. These gains
were somewhat offset by weaker sales in the U.K. In October, the company
announced a substantial price increase on its general trade products due to
significant increases in shipping, handling and production costs.

         Sulfate of potash sales volumes increased 12 percent over the third
quarter of 2004 and prices improved by 14 percent, generating a 28 percent
year-over-year increase in specialty fertilizer sales. Part of the volume
increase was due to an intentional shift of some export sales from the fourth
quarter into the third quarter to help the company improve its shipping
efficiency.

         Shipping and handling costs increased 21 percent over the prior-year
quarter largely offsetting the benefit of Compass's gross sales growth.

         Compass Minerals employs a natural gas hedging program which helped
protect the company from sharp increases in production costs this quarter.
Nonetheless, natural gas costs were approximately $1 million higher than in the
third quarter of 2004.

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Third-Quarter 2005 Results
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                               SELECTED SALES DATA




                                                      THREE MONTHS ENDED            NINE MONTHS ENDED
                                                         SEPTEMBER 30,                 SEPTEMBER 30,
                                                   -------------------------     ------------------------
                                                      2005           2004           2005           2004
                                                   ---------      ---------      ---------      ---------
                                                                                    
SALES VOLUMES (IN THOUSANDS OF TONS):
Highway deicing .............................          1,134          1,219          6,958          6,744
General trade ...............................            701            692          2,125          2,107
Specialty potash ............................             85             76            293            276
AVERAGE SALES PRICE (PER TON):
Highway deicing .............................       $  27.76       $  26.39       $  31.70       $  30.07
General trade ...............................          95.21          89.97          95.68          92.40
Specialty potash ............................         259.60         227.09         252.88         223.53


         Selling, general and administrative costs were $0.8 million higher this
quarter than in the third quarter of 2004 largely due to increases in the cost
of medical benefits, salaries and higher professional services costs.

         Interest expense increased $0.6 million to $16.0 million, which
includes a $6.7 million non-cash accrual for payment-in-kind interest on the
company's discount notes. At September 30, 2005, the company's long-term debt
was $590.0 million compared to $582.7 million at December 31, 2004. The increase
reflects borrowings of $29 million on the company's revolving line of credit and
accretion on the company's discount notes, partially offset by a $10 million
reduction in the company's term loan balance. Compass typically draws on its
revolving line of credit in the third and fourth quarters of the year when its
inventories and receivables are greatest.

         Cash flow from operations was $70.1 million for the nine months ended
September 30, 2005 compared to $86.8 million for the first nine months of 2004.
The difference was principally due to higher income tax payments and other
changes in working capital.

         Capital expenditures were $19.1 million for the nine months ended
September 30, 2005 compared to $16.4 million for the same period in 2004. In
August, Compass announced plans to expand its magnesium chloride plant at the
Great Salt Lake and to install a new mill at its Goderich, Ontario salt mine.
These projects are expected to increase the company's 2005 capital expenditures
by $5 million to an estimated total of $32 million and to add $14 million to its
2006 capital budget.

EARNINGS CALL

         Compass Minerals International will discuss its third-quarter 2005
financial results on a conference call tomorrow, November 1, at 10:00 a.m. ET.
To access the conference call, interested parties should visit the company's
website at www.CompassMinerals.com or dial (877) 228-7138.

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Third-Quarter 2005 Results
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         Outside of the U.S. and Canada, callers may dial (706) 643-0377.
Replays of the call will be available on the company's website for two weeks.
The replay can also be accessed by phone for seven days at (800) 642-1687,
Conference ID 1401206. Outside of the U.S. and Canada, callers may dial (706)
645-9291.


ABOUT COMPASS MINERALS INTERNATIONAL

         Based in the Kansas City metropolitan area, Compass is the
second-leading salt producer in North America and the largest in the United
Kingdom. The company operates nine production facilities, including the largest
rock salt mine in the world in Goderich, Ontario. The company's product lines
include salt for highway deicing, consumer deicing, water conditioning, consumer
and industrial food preparation, agriculture and industrial applications. In
addition, Compass is North America's leading producer of sulfate of potash,
which is used in the production of specialty fertilizers for high-value crops
and turf, and magnesium chloride, which is a premium deicing and dust control
agent.

NON-GAAP MEASURES

         Management uses a variety of measures to evaluate the company's
performance. While the consolidated financial statements provide an
understanding of our overall results of operations, financial condition and cash
flows, management also believes that EBITDA (earnings before interest, taxes,
depreciation and amortization) and adjusted EBITDA (EBITDA adjusted for
secondary offering costs in 2004 and other income/expense) are useful measures
to evaluate the operating performance of our core businesses. Because our
resource allocation, income tax positions and cost of capital are managed at a
corporate level outside the control of the operating units, management believes
that EBITDA also provides a useful measure to evaluate our operating
performance. EBITDA is not calculated under generally accepted accounting
principles (GAAP) and should not be considered in isolation or as a substitute
for net income, cash flows or other income or cash flow data prepared in
accordance with GAAP or as a measure of our overall profitability or liquidity.
While EBITDA is frequently used as a measure of operating performance, this term
is not necessarily comparable to similarly titled measures of other companies
due to the potential inconsistencies in the method of calculation. Excluding
non-recurring items from net income - including the partial release of a tax
reserve, net of other income tax adjustments; income tax expense for a
repatriation of funds; and public offering costs, net of tax - is meaningful to
investors because it provides insight with respect to ongoing operating results
of the company. The calculations of these measures as used by management are set
forth in the tables below.

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Third-Quarter 2005 Results
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                  RECONCILIATION FOR EBITDA AND ADJUSTED EBITDA
                                  (in millions)




                                                 THREE MONTHS ENDED        NINE MONTHS ENDED
                                                   SEPTEMBER 30,               SEPTEMBER 30,
                                              -----------------------     ----------------------
                                                 2005          2004          2005         2004
                                              ---------     ---------     ---------    ---------
                                                                           
Net earnings (loss)                           $    (4.4)    $     5.5     $    17.5    $    29.9

Income tax expense (benefit)                       (3.2)        (12.2)          8.0         (3.1)
Interest expense                                   16.0          15.4          47.6         45.9
Depreciation, depletion and amortization           10.7          10.1          32.2         30.4
                                              ---------     ---------     ---------    ---------
EBITDA                                        $    19.1     $    18.8     $   105.3    $   103.1
Adjustments to income from operations:
  Other charges(1)                                   --           0.6            --          1.0
  Other (income) expense, net(2)                    3.4           3.3           4.4          4.0
                                              ---------     ---------     ---------    ---------
Adjusted EBITDA                               $    22.5     $    22.7     $   109.7    $   108.1


- --------------
(1)      "Other charges" includes costs for a secondary offering of our common
         stock that closed in July 2004 and for a Form S-1 filed with the
         Securities and Exchange Commission in September 2004. The shares sold
         in the July offering were previously held by stockholders and we did
         not receive any proceeds from the sale.

(2)      "Other (income) expense" primarily includes interest income and foreign
         exchange gains and losses in all periods.


         RECONCILIATION FOR NET EARNINGS (LOSS), EXCLUDING SPECIAL ITEMS
                                  (in millions)




                                                                 THREE MONTHS ENDED       NINE MONTHS ENDED
                                                                    SEPTEMBER 30,            SEPTEMBER 30,
                                                                 -------------------     ---------------------
                                                                   2005        2004        2005          2004
                                                                 -------     -------     --------     --------
                                                                                          
Net earnings (loss)                                              $  (4.4)    $   5.5     $   17.5     $   29.9
  Plus (less) special items:
  Release of tax reserve, net of other tax adjustments(1)             --       (11.1)        (4.8)       (11.1)
  Charge to income tax expense for one-time repatriation of
    funds(2)                                                          --          --          5.4           --
  Stock offering costs, net of tax(3)                                 --         0.5           --          0.8
                                                                 -------     -------     --------     --------
Net earnings (loss), excluding special items                     $  (4.4)    $  (5.1)    $   18.1     $   19.6


- ------------------
(1)      In 2005, taxing authorities developed a framework to treat cross-border
         transactions between the U.S. and Canada more consistently so we
         reversed previously recorded income tax reserves of $4.8 million, net
         of other income tax adjustments. We recorded a non-cash benefit to
         earnings of $11.1 million in the third quarter of 2004 due to the
         release of part of the company's valuation allowance for deferred tax
         assets.

(2)      We recorded a $5.4 million charge to income tax expense due to a
         one-time repatriation of funds from the U.K.

(3)      We incurred pretax costs of $0.4 million in each of the second and
         third quarters of 2004 for a secondary offering of our common stock
         that closed in July 2004, and $0.2 million in the third quarter of 2004
         for a Form S-1 filed with the SEC in September 2004. The shares sold in
         the offerings were previously held by stockholders and we did not
         receive any proceeds from the sale. These items are presented in the
         table net of tax.


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Third-Quarter 2005 Results
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                      COMPASS MINERALS INTERNATIONAL, INC.
                CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)
                        (IN MILLIONS, EXCEPT SHARE DATA)



                                                     THREE MONTHS ENDED             NINE MONTHS ENDED
                                                       SEPTEMBER 30,                  SEPTEMBER 30,
                                                  -------------------------     -------------------------
                                                     2005           2004           2005           2004
                                                  ----------     ----------     ----------     ----------
                                                                                   

Sales                                                 $120.3         $111.7          498.1          459.1
Cost of sales - shipping and handling                   33.5           27.8          147.6          124.9
Cost of sales - products                                60.9           58.0          229.8          216.2
                                                  ----------     ----------     ----------     ----------
 Gross profit                                           25.9           25.9          120.7          118.0
Selling, general and administrative expenses            14.1           13.3           43.2           40.3
Other charges                                             --            0.6             --            1.0
                                                  ----------     ----------     ----------     ----------
 Operating earnings                                     11.8           12.0           77.5           76.7

Other (income) expense:
 Interest expense                                       16.0           15.4           47.6           45.9
 Other, net                                              3.4            3.3            4.4            4.0
                                                  ----------     ----------     ----------     ----------
Earnings (loss) before income taxes                     (7.6)          (6.7)          25.5           26.8
Income tax expense (benefit)                            (3.2)         (12.2)           8.0           (3.1)
                                                  ----------     ----------     ----------     ----------
Net earnings (loss)                                    $(4.4)          $5.5          $17.5          $29.9
                                                  ==========     ==========     ==========     ==========
Net earnings (loss) per share, basic                  $(0.14)         $0.18          $0.56          $0.98
Net earnings (loss) per share, diluted
                                                       (0.14)          0.17           0.55           0.93
Cash dividends per share, common                       0.275          0.250          0.825         0.6875

Basic weighted-average shares outstanding         31,593,768     30,785,285     31,388,460     30,514,439
Diluted weighted-average shares outstanding       31,593,768     32,273,436     32,006,095     32,224,950



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Third-Quarter 2005 Results
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                      COMPASS MINERALS INTERNATIONAL, INC.
                CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED)
                                  (IN MILLIONS)



                                                                       SEPTEMBER 30,    DECEMBER 31,
                                                                           2005             2004
                                                                       -------------    ------------
                                                                                  

                              ASSETS

Cash and cash equivalents .....................................          $   23.8         $    9.7
Receivables, net ..............................................              74.7            143.0
Inventories ...................................................             119.5             96.3
Other current assets ..........................................              24.8             17.0
Property, plant and equipment, net ............................             388.3            402.9
Intangible assets, net ........................................              22.8             23.6
Other non-current assets ......................................              32.1             31.4
                                                                         --------         --------
    Total assets ..............................................          $  686.0         $  723.9
                                                                         ========         ========
                  LIABILITIES AND STOCKHOLDERS'
                         EQUITY (DEFICIT)

Current liabilities ...........................................          $   93.5         $  134.9
Long-term debt, net of current portion ........................             590.0            582.7
Deferred income taxes .........................................              44.2             55.1
Other noncurrent liabilities ..................................              41.3             39.6
Total stockholders' equity (deficit) ..........................             (83.0)           (88.4)
                                                                         --------         --------

      Total liabilities and stockholders' equity (deficit) ....          $  686.0         $  723.9
                                                                         ========         ========




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Third-Quarter 2005 Results
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                      COMPASS MINERALS INTERNATIONAL, INC.
           CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
                                  (IN MILLIONS)



                                                          NINE MONTHS ENDED
                                                            SEPTEMBER 30,
                                                      -----------------------
                                                        2005          2004
                                                      ---------     ---------
                                                              
Net cash provided by operating activities ........    $    70.1     $    86.8
                                                      ---------     ---------

Cash flows from investing activities:
  Capital expenditures ...........................        (19.1)        (16.4)
  Other ..........................................         (3.5)          0.3
                                                      ---------     ---------
Net cash used in investing activities ............        (22.6)        (16.1)
                                                      ---------     ---------

Cash flows from financing activities:
  Principal payments on long-term debt ...........        (30.2)        (30.6)
  Revolver activity ..............................         18.0         (14.0)
  Dividends paid .................................        (25.9)        (21.0)
  Proceeds from stock option exercises ...........          1.2           1.2
  Other, net .....................................         (0.1)         (0.1)
                                                      ---------     ---------
Net cash used in financing activities ............        (37.0)        (64.5)
                                                      ---------     ---------
Effect of exchange rate changes on cash and cash
  equivalents ....................................          3.6          (0.5)
                                                      ---------     ---------
Net increase in cash and cash equivalents .......          14.1           5.7
Cash and cash equivalents, beginning of period...           9.7           2.6
                                                      ---------     ---------

Cash and cash equivalents, end of period ........     $    23.8     $     8.3
                                                      =========     =========



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Third-Quarter 2005 Results
Page 9 of 9


                      COMPASS MINERALS INTERNATIONAL, INC.
                         SEGMENT INFORMATION (UNAUDITED)
                                  (IN MILLIONS)

                                QUARTER RESULTS




 THREE MONTHS ENDED SEPTEMBER 30, 2005                    SALT       POTASH     OTHER (a)    TOTAL
 ----------------------------------------------------------------------------------------------------
                                                                                

Sales to external customers ......................      $   98.2    $   22.1    $    --     $  120.3
Intersegment sales ...............................            --         2.3       (2.3)          --
Cost of sales - shipping and handling costs ......          30.6         2.9         --         33.5
Operating earnings (loss) ........................          11.6         6.4       (6.2)        11.8
Depreciation, depletion and amortization .........           8.7         2.0         --         10.7
Total assets .....................................         510.1       133.1       42.8        686.0




 THREE MONTHS ENDED SEPTEMBER 30, 2004 ...........       SALT        POTASH     OTHER (a)    TOTAL
 ----------------------------------------------------------------------------------------------------
                                                                                

Sales to external customers ......................      $   94.4    $   17.3    $    --     $  111.7
Intersegment sales ...............................            --         2.6       (2.6)          --
Cost of sales - shipping and handling costs ......          25.2         2.6         --         27.8
Operating earnings (loss) ........................          12.8         5.0       (5.8)        12.0
Depreciation, depletion and amortization .........           8.1         2.0         --         10.1
Total assets .....................................         485.9       134.6       21.2        641.7


                              YEAR-TO-DATE RESULTS



 NINE MONTHS ENDED SEPTEMBER 30, 2005                     SALT       POTASH     OTHER (a)     TOTAL
 ----------------------------------------------------------------------------------------------------
                                                                                

Sales to external customers ......................      $  424.0    $   74.1    $    --     $  498.1
Intersegment sales ...............................            --         7.1       (7.1)          --
Cost of sales - shipping and handling costs ......         136.7        10.9         --        147.6
Operating earnings (loss) ........................          74.9        20.6      (18.0)        77.5
Depreciation, depletion and amortization .........          26.0         6.2         --         32.2





 NINE MONTHS ENDED SEPTEMBER 30, 2004                     SALT       POTASH     OTHER (a)     TOTAL
 ----------------------------------------------------------------------------------------------------
                                                                                
Sales to external customers ......................      $  397.4    $   61.7    $    --     $  459.1
Intersegment sales ...............................            --         7.4       (7.4)          --
Cost of sales - shipping and handling costs ......         115.1         9.8         --        124.9
Operating earnings (loss) ........................          79.3        14.2      (16.8)        76.7
Depreciation, depletion and amortization .........          24.4         6.0         --         30.4


(a)  "Other" includes corporate entities and eliminations.

This press release may contain forward-looking statements within the meaning of
the Private Securities Litigation Reform Act of 1995. These statements are based
on the Company's current expectations and involve risks and uncertainties that
could cause the Company's actual results to differ materially. The differences
could be caused by a number of factors including those factors identified in
Compass Minerals International's annual report on form 10-k filed with the
Securities and Exchange Commission on March 16, 2005. The Company will not
update any forward-looking statements made in this press release to reflect
future events or developments.

                                       ###