UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549


                                    FORM 8-K


                             Current Report Pursuant
                          to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934



        Date of report (Date of earliest event reported): April 29, 2005


                               KEYSPAN CORPORATION
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             (Exact Name of Registrant as Specified in Its Charter)


                                    New York
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                 (State or Other Jurisdiction of Incorporation)


     1-14161                                              11-3431358
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(Commission File Number)                       (IRS Employer Identification No.)

175 East Old Country Road, Hicksville, New York                   11801
 One MetroTech Center, Brooklyn, New York                         11201
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(Address of Principal Executive Offices)                        (Zip Code)

                           (631) 755-6650 (Hicksville)
                            (718) 403-1000 (Brooklyn)
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              (Registrant's Telephone Number, Including Area Code)


                                       N/A
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          (Former Name or Former Address, if Changed Since Last Report)







Cautionary Language Concerning Forward-Looking Statements

Certain  statements  contained  herein  are  forward-looking  statements,  which
reflect  numerous  assumptions  and  estimates and involve a number of risks and
uncertainties.  For these statements, we claim the protection of the safe harbor
for  forward-looking  statements  provided by the Private Securities  Litigation
Reform Act of 1995.

There are possible  developments  that could cause our actual  results to differ
materially from those forecast or implied in the forward-looking statements. You
are cautioned not to place undue reliance on these  forward-looking  statements,
which are current only as of the date of this filing.  We disclaim any intention
or obligation to update or revise any forward-looking  statements,  whether as a
result of new information, future events or otherwise.

Among the factors  that could cause  actual  results to differ  materially  are:
general  economic  conditions,   especially  in  the  Northeast  United  States;
available sources and cost of fuel; volatility of energy prices in a deregulated
market  environment  as well as in the  source of  natural  gas and fuel used to
generate  electricity;  potential  write-down  of our  investment in natural gas
properties  when  natural  gas prices are  depressed  or if we have  significant
downward  revisions  in our  estimated  proved gas  reserves;  federal and state
regulatory  initiatives that increase competition,  threaten cost and investment
recovery,  and impact rate  structures;  our ability to successfully  reduce our
cost structures; implementation of new accounting standards; the degree to which
the we develop  unregulated  business  ventures;  as well as  federal  and state
regulatory  policies  affecting our ability to retain and operate those business
ventures; our ability to identify and make complementary  acquisitions,  as well
as the successful  integration of those  acquisitions;  inflationary  trends and
interest rates; and risks detailed from time to time in reports filed by us with
the Securities and Exchange Commission.



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Item 2.02         Results of Operations and Financial Condition
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On April 29, 2005,  the Company issued a press release  concerning,  among other
things,  its  consolidated  earnings for the period  ended March 31,  2005.  The
Company's  press  release is attached  hereto as Exhibit  99.1 and  incorporated
herein by reference.

The Company will also host an earnings conference call at 10:30 A.M.EST on April
29, 2005 to discuss its  consolidated  earnings  for the period  ended March 31,
2005. The script of the earnings  conference  call is attached hereto as Exhibit
99.2 and incorporated herein by reference.


Item 9.01         Financial Statements and Exhibits
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(c) Exhibits.

                  99.1     Press Release of the Company dated April 29, 2005.

                  99.2     Script of Earnings Conference Call.











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                                   SIGNATURES


Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                                    KEYSPAN CORPORATION

Dated: April 29, 2005                       By:         /s/Gerald Luterman
                                                          Gerald Luterman
                                                    Executive Vice President &
                                                    Chief Financial Officer

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                                INDEX TO EXHIBITS
                                -----------------


Exhibit No.             Exhibit                                          Page
- -----------             -------------------------------------          --------

99.1                    Press Release dated April 29, 2005.                6

99.2                    Script of Earnings Conference Call.               12









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