[GRAPHIC OMITTED]
                                      KIRBY


KIRBY CORPORATION                                         Contact: Steve Holcomb
                                                                    713-435-1135

FOR IMMEDIATE RELEASE
- ---------------------


                   KIRBY CORPORATION ANNOUNCES RECORD RESULTS
                           FOR THE 2005 FIRST QUARTER


- -    2005  FIRST  QUARTER  EARNINGS  PER  SHARE  WERE  $.52,  AN INCREASE OF 44%
     OVER $.36 REPORTED FOR THE 2004 FIRST QUARTER

- -    RESULTS  REFLECT  CONTINUED  STRONG  PETROCHEMICAL  AND  BLACK  OIL PRODUCT
     VOLUMES,  FAVORABLE  OPERATING  CONDITIONS  IN  MARCH AND CONTRACT AND SPOT
     MARKET RATE INCREASES

- -    2005  SECOND  QUARTER  EARNINGS  PER  SHARE GUIDANCE IS $.65 TO $.70 VERSUS
     $.55 REPORTED FOR THE 2004 SECOND QUARTER

- -    2005  YEAR  EARNINGS  PER  SHARE  GUIDANCE  INCREASED  TO  $2.45  TO  $2.55
     VERSUS $1.97 EARNED IN THE 2004 YEAR.

HOUSTON,  TEXAS  (APRIL 27, 2005) - Kirby Corporation ("Kirby") (NYSE:KEX) today
announced  record  net  earnings  for  the first quarter ended March 31, 2005 of
$13,279,000,  or  $.52  per  share, compared with net earnings of $9,020,000, or
$.36 per share, for the 2004 first quarter.  The 2005 first quarter results were
in line with Kirby's April 14, 2005 announcement that earnings would exceed $.50
per  share  and above Kirby's original published earnings guidance range of $.42
to  $.48  per  share.  Consolidated  revenues  for the 2005 first quarter were a
record  $184,444,000, an increase of 17% over $157,315,000 reported for the 2004
first  quarter.

Revenues  for  the  marine  transportation  segment  for  the 2005 first quarter
increased 16% and operating income increased 42% compared with the first quarter
of  2004.  The  higher  results  reflected  strong  petrochemical  and black oil
volumes,  improved  weather  conditions  in  March,  the impact of contract rate
increases  during  2004  and  in  the 2005 first quarter, and higher spot market
prices.  Spot  market rates for most product lines averaged 4% to 5% higher than
the 2004 fourth quarter.  In addition, effective January 1, 2005, escalators for
labor  and  the  producer  price  index  on  contracts  over  a year in duration
positively  impacted  the  first  quarter.


                                        1

The  diesel  engine  services  segment  for  the 2005 first quarter reported 25%
higher  revenues  and  operating  income  increased  42%  compared  with  the
corresponding  2004  quarter.   The  higher  results reflect strong in-house and
in-field service activity and direct parts sales in the majority of its markets,
and  the  acquisition of the diesel engine service operation and parts inventory
of  Walker  Paducah Corp. in April 2004.  The U.S. Midwest and East Coast marine
markets, the U.S. railroad market, the offshore oil service market and the power
generation market all reflected improved activity.  The operating margin for the
2005  first  quarter  was  12.6% compared with 11.2% for the 2004 first quarter.

Equity in earnings (loss) of marine affiliates consists primarily of a 35% owned
offshore partnership, operating four offshore dry-cargo barge and tug units, and
a  33% interest in Osprey Line, LLC, a barge feeder service for cargo containers
along  the  Gulf  Intracoastal  Waterway, several ports above Baton Rouge on the
Mississippi  River, as well as coastal service along the Gulf of Mexico.  Equity
in  earnings  (loss)  of  marine  affiliates was a loss of $703,000 for the 2005
first  quarter, reflecting a heavy shipyard schedule for the Company's 35% owned
offshore  partnership  and start-up costs for Osprey's coastal service along the
Gulf  of  Mexico,  which  began  its  service  late  last  year.

Joe  Pyne, President and Chief Executive Officer of Kirby, commented, "The first
quarter  is  normally  the most difficult quarter for Kirby.  During January and
February,  stronger customer demand, particularly in the petrochemical and black
oil  markets,  was negatively impacted by poor navigational conditions, creating
pent-up  demand for movements in March.  Although total first quarter navigation
delay  days  were  higher  than  in  2004, weather and river conditions improved
significantly  in  March,  which  allowed  for better asset utilization and more
efficient  use  of  horsepower. Total ton miles were about the same as the first
quarter  of  2004,  but  product mix, contract and spot rate increases, and fuel
cost  recovery  resulted  in a 16% growth in marine transportation revenue and a
42%  increase  in  operating  income."

Commenting  on  the 2005 second quarter market conditions and guidance, Mr. Pyne
said,  "We  expect our petrochemical and black oil markets to remain strong.  We
anticipate  a normal seasonal improvement in our upriver refined products market
and  seasonal  agricultural  chemical volumes.  For the 2005 second quarter, our
earnings  per  share  guidance  is  $.65  to  $.70, compared with $.55 per share
reported  for  the  2004  second  quarter.  For  the 2005 year, we increased our
guidance  to  $2.45  to $2.55 per share from previous guidance of $2.20 to $2.30
per  share.  This  guidance  compares with 2004 net earnings of $1.97 per share.
Capital spending guidance for 2005 remains in the $110 to $120 million range and
includes approximately $65 million for the construction of 18 double hull 30,000
barrel  capacity  inland  tank  barges and 20 double hull 10,000 barrel capacity
inland  tank  barges.  The $65 million estimate for the construction of new tank
barges  is  subject  to  the  fluctuation  of  steel  prices."

This  earnings press release includes marine transportation performance measures
for both the 2005 and 2004 first quarters.  The performance measures include ton
miles,  revenues  per  ton  mile,  towboats operated and delay days.  Comparable
performance  measures  for the 2004 and 2003 years and quarters are available at
Kirby's  web  site  under  the  caption Performance Measurements in the Investor
Relations  section.  Kirby's  homepage  can  be  accessed  by  visiting
www.kirbycorp.com.
- -----------------


                                        2

A  conference  call  is scheduled at 10:00 a.m. central time tomorrow, Thursday,
April  28,  2005,  to  discuss  the  2005 first quarter and outlook for the 2005
second  quarter  and  year.  The  conference  call  number  is  888-328-2514 for
domestic  callers and 706-679-3262 for international callers.  The leader's name
is Steve Holcomb.  An audio playback will be available starting at approximately
12:00 p.m. central time on Thursday, April 28, through 6:00 p.m. central time on
Friday,  May  27,  2005,  by  dialing  800-642-1687  for  domestic  callers  and
706-645-9291  for  international  callers.  The conference ID number is 5580272.
The  conference  call  can  also  be  accessed  by  visiting Kirby's homepage at
http://www.kirbycorp.com/  or  at  http://audioevent.mshow.com/229462.  A replay
- ------------------------           ----------------------------------
will  be  available  on  each  of those web sites following the conference call.

The  financial  and  other information to be discussed in the conference call is
available  in this press release and in a Form 8-K filed with the Securities and
Exchange  Commission.  This  press  release  and the Form 8-K include a non-GAAP
financial  measure,  EBITDA, which Kirby defines as net earnings before interest
expense,  taxes  on  income, depreciation and amortization.  A reconciliation of
EBITDA  for the 2005 and 2004 first quarters with GAAP net earnings for the same
periods  is included in the Condensed Consolidated Financial Information in this
press  release.

Kirby  Corporation,  based  in  Houston,  Texas, operates inland tank barges and
towing  vessels,  transporting  petrochemicals,  black  oil  products,  refined
petroleum  products  and  agricultural  chemicals  throughout  the United States
inland  waterway  system.  Through  the  diesel  engine  services segment, Kirby
provides  after-market  service  for  large  medium-speed  and high-speed diesel
engines  and  reduction  gears  used  in  marine,  power generation and railroad
applications.

Statements  contained  in  this  press  release  with  respect to the future are
forward-looking  statements.  These  statements  reflect management's reasonable
judgment  with  respect  to  future  events.  Forward-looking statements involve
risks  and  uncertainties.  Actual  results  could  differ materially from those
anticipated  as  a  result  of  various  factors,  including  cyclical  or other
downturns in demand, significant pricing competition, unanticipated additions to
industry  capacity,  changes  in  the  Jones  Act or in U.S. maritime policy and
practice,  fuel costs, interest rates, weather conditions, and timing, magnitude
and  number of acquisitions made by Kirby.  Forward-looking statements are based
on currently available information and Kirby assumes on obligation to update any
such  statements.  A  list  of  additional  risk factors can be found in Kirby's
annual  report on Form 10-K for the year ended December 31, 2004, filed with the
Securities  and  Exchange  Commission.

- --------------------------------------------------------------------------------
                           CONFERENCE CALL INFORMATION

DATE:     THURSDAY, APRIL 28, 2005     LEADER:     STEVE  HOLCOMB
TIME:     10:00 A.M. CENTRAL TIME      PASSCODE:   KIRBY
U.S.:     888-328-2514                 INT'L:      706-679-3262
WEBSITE:     http://www.kirbycorp.com/ OR http://audioevent.mshow.com/229462
             -------------------------    ----------------------------------
- --------------------------------------------------------------------------------


                                        3

A summary of the results for the first quarter follows.



                          CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS
                          ---------------------------------------------

                                                                  FIRST QUARTER
                                                    ------------------------------------------
                                                            2005                 2004
                                                    --------------------  --------------------
                                                         (UNAUDITED, $ IN THOUSANDS EXCEPT
                                                                 PER SHARE AMOUNTS)
                                                                    
Revenues:
    Marine transportation. . . . . . . . . . . . .  $           157,210   $           135,493
    Diesel engine services . . . . . . . . . . . .               27,234                21,822
                                                    --------------------  --------------------
                                                                184,444               157,315
                                                    --------------------  --------------------
Costs and expenses:
    Costs of sales and operating expenses. . . . .              119,927               102,927
    Selling, general and administrative. . . . . .               20,959                19,965
    Taxes, other than on income. . . . . . . . . .                3,186                 3,252
    Depreciation and amortization. . . . . . . . .               14,981                13,797
    Loss (gain) on disposition of assets . . . . .                 (192)                    2
                                                    --------------------  --------------------
                                                                158,861               139,943
                                                    --------------------  --------------------

      Operating income . . . . . . . . . . . . . .               25,583                17,372
    Equity in earnings (loss) of marine affiliates                 (703)                  822
    Other expense. . . . . . . . . . . . . . . . .                 (316)                 (271)
    Interest expense . . . . . . . . . . . . . . .               (3,146)               (3,374)
                                                    --------------------  --------------------

      Earnings before taxes on income. . . . . . .               21,418                14,549
    Provision for taxes on income. . . . . . . . .               (8,139)               (5,529)
                                                    --------------------  --------------------
      Net earnings . . . . . . . . . . . . . . . .  $            13,279   $             9,020
                                                    ====================  ====================


Net earnings per share of common stock:
    Basic. . . . . . . . . . . . . . . . . . . . .  $              0.53   $              0.37
    Diluted. . . . . . . . . . . . . . . . . . . .  $              0.52   $              0.36
Common stock outstanding (in thousands):
    Basic. . . . . . . . . . . . . . . . . . . . .               24,854                24,345
    Diluted. . . . . . . . . . . . . . . . . . . .               25,578                24,913




                           CONDENSED CONSOLIDATED FINANCIAL INFORMATION
                           --------------------------------------------

                                                              FIRST QUARTER
                                               ------------------------------------------
                                                       2005                 2004
                                               --------------------  --------------------
                                                  (UNAUDITED, $ IN THOUSANDS EXCEPT
                                                            PER SHARE AMOUNTS)
                                                               
EBITDA: (1)
    Net earnings. . . . . . . . . . . . . . .  $            13,279   $             9,020
    Interest expense. . . . . . . . . . . . .                3,146                 3,374
    Provision for taxes on income . . . . . .                8,139                 5,529
    Depreciation and amortization . . . . . .               14,981                13,797
                                               --------------------  --------------------
                                               $            39,545   $            31,720
                                               ====================  ====================

Capital expenditures. . . . . . . . . . . . .  $            24,023   $            24,047
Acquisition of marine equipment . . . . . . .  $                 -   $             1,110
                                                               MARCH 31,
                                               ------------------------------------------
                                                       2005                 2004
                                               --------------------  --------------------
                                                      (UNAUDITED, $ IN THOUSANDS)
Long-term debt, including current portion . .  $           205,139   $           250,409
Stockholders' equity. . . . . . . . . . . . .  $           454,672   $           381,674
Debt to capitalization ratio. . . . . . . . .                 31.1%                 39.6%



                                        4



                  MARINE TRANSPORTATION STATEMENTS OF EARNINGS
                  ---------------------------------------------

                                                         FIRST QUARTER
                                           ------------------------------------------
                                                   2005                  2004
                                           --------------------  --------------------
                                                    (UNAUDITED, $ IN THOUSANDS)
                                                           

Marine transportation revenues. . . . . .  $           157,210   $           135,493
                                           --------------------  --------------------

Costs and expenses:
    Costs of sales and operating expenses               99,652                86,966
    Selling, general and administrative .               16,312                15,504
    Taxes, other than on income . . . . .                3,050                 3,133
    Depreciation and amortization . . . .               14,275                13,016
                                           --------------------  --------------------
                                                       133,289               118,619
                                           --------------------  --------------------

      Operating income. . . . . . . . . .  $            23,921   $            16,874
                                           ====================  ====================

      Operating margins . . . . . . . . .                 15.2%                 12.5%
                                           ====================  ====================





                  DIESEL ENGINE SERVICES STATEMENTS OF EARNINGS
                  ---------------------------------------------

                                                         FIRST QUARTER
                                           ------------------------------------------
                                                   2005                  2004
                                           --------------------  --------------------
                                                    (UNAUDITED, $ IN THOUSANDS)
                                                           

Diesel engine services revenues . . . . .  $            27,234   $            21,822
                                           --------------------  --------------------

Costs and expenses:
    Costs of sales and operating expenses               20,269                15,934
    Selling, general and administrative .                3,110                 3,034
    Taxes, other than on income . . . . .                  110                    82
    Depreciation and amortization . . . .                  278                   333
                                           --------------------  --------------------
                                                        23,767                19,383
                                           --------------------  --------------------

      Operating income. . . . . . . . . .  $             3,467   $             2,439
                                           ====================  ====================

      Operating margins . . . . . . . . .                 12.7%                 11.2%
                                           ====================  ====================




                              OTHER COSTS AND EXPENSES
                              ------------------------

                                                              FIRST QUARTER
                                                -----------------------------------------
                                                         2005                 2004
                                                --------------------  -------------------
                                                        (UNAUDITED, $ IN THOUSANDS)
                                                                
General corporate expenses . . . . . . . . . .  $             1,997   $             1,939
                                                ====================  ===================

Loss (gain) on disposition of assets . . . . .  $              (192)  $                 2
                                                ====================  ===================



                                        5



          MARINE TRANSPORTATION PERFORMANCE MEASUREMENTS
          ----------------------------------------------

                                                   FIRST QUARTER
                                                -------------------
                                                 2005         2004
                                                ----------   ---------
                                                       
Ton Miles (in millions) (2) . . . . . . . . . .     3,738        3,735
Revenue/Ton Mile (cents/tm) (3) . . . . . . . .       4.2          3.6
Towboats operated (average) (4) . . . . . . . .       239          233
Delay Days (5). . . . . . . . . . . . . . . . .     3,289        2,359
Average cost per gallon of fuel consumed. . . . $    1.32    $     .99
Tank barges:
    Active. . . . . . . . . . . . . . . . . . .       878          874
    Inactive. . . . . . . . . . . . . . . . . .        64           71
Barrel Capacities (in millions):
    Active. . . . . . . . . . . . . . . . . . .      16.3         16.0
    Inactive. . . . . . . . . . . . . . . . . .       1.2          1.3



(1)  Kirby  has  historically  evaluated  its  operating  performance  using
     numerous  measures,  one  of which is EBITDA, a non-GAAP financial measure.
     Kirby  defines  EBITDA  as  net  earnings before interest expense, taxes on
     income,  depreciation  and amortization. EBITDA is presented because of its
     wide  acceptance as a financial indicator. EBITDA is one of the performance
     measures  used  in  Kirby's  incentive  bonus  plan. EBITDA is also used by
     rating  agencies  in  determining  Kirby's  credit  rating  and by analysts
     publishing  research  reports  on  Kirby,  as  well  as  by  investors  and
     investment  bankers  generally  in  valuing  companies.  EBITDA  is  not  a
     calculation  based  on  generally accepted accounting principles and should
     not  be  considered  as an alternative to, but should only be considered in
     conjunction with, Kirby's GAAP financial information.
(2)  Ton  miles  indicate  fleet  productivity  by  measuring  the  distance (in
     miles)  a loaded tank barge is moved. Example: A typical 30,000 barrel tank
     barge  loaded  with  3,300  tons  of  liquid cargo is moved 100 miles, thus
     generating 330,000 ton miles.
(3)  Marine  transportation  revenues  divided  by  ton  miles.  Example:  First
     quarter  2005 revenues of $157,210,000 divided by 3,738,000,000 ton miles =
     4.2 cents.
(4)  Towboats  operated  are  the  average  number  of  owned  and  chartered
     towboats operated during the period.
(5)  Delay  days  measures  the  lost  time  incurred by a tow (towboat and tank
     barges)  during  transit.  The  measure  includes  transit delays caused by
     weather, lock congestion and other navigational factors.

                                      # # #


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