<ARTICLE>           UT
<LEGEND>
THIS  SCHEDULE   CONTAINS   SUMMARY   FINANCIAL   INFORMATION   EXTRACTED   FROM
CONSTELLATION  ENERGY'S  JUNE 30, 2000 INTERIM  CONSOLIDATED  INCOME  STATEMENT,
BALANCE  SHEET AND  STATEMENT  OF CASH FLOWS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH STATEMENTS.
</LEGEND>
<CIK>                                                 0001004440
<NAME>                                                Constellation Energy Group
<MULTIPLIER>                                          1,000,000

                                                   
<PERIOD-TYPE>                                         6-MOS
<FISCAL-YEAR-END>                                     DEC-31-2000
<PERIOD-START>                                        JAN-01-2000
<PERIOD-END>                                          JUN-30-2000
<BOOK-VALUE>                                          PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                                            5,559
<OTHER-PROPERTY-AND-INVEST>                                          2,256
<TOTAL-CURRENT-ASSETS>                                               2,236
<TOTAL-DEFERRED-CHARGES>                                               585
<OTHER-ASSETS>                                                           0
<TOTAL-ASSETS>                                                      10,636
<COMMON>                                                             1,502
<CAPITAL-SURPLUS-PAID-IN>                                                0
<RETAINED-EARNINGS>                                                  1,485
<TOTAL-COMMON-STOCKHOLDERS-EQ>                                       3,011
<PREFERRED-MANDATORY>                                                    0
<PREFERRED>                                                            190
<LONG-TERM-DEBT-NET>                                                 2,953
<SHORT-TERM-NOTES>                                                       0
<LONG-TERM-NOTES-PAYABLE>                                                0
<COMMERCIAL-PAPER-OBLIGATIONS>                                         215
<LONG-TERM-DEBT-CURRENT-PORT>                                          883
<PREFERRED-STOCK-CURRENT>                                                0
<CAPITAL-LEASE-OBLIGATIONS>                                              0
<LEASES-CURRENT>                                                         0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                                       3,384
<TOT-CAPITALIZATION-AND-LIAB>                                       10,636
<GROSS-OPERATING-REVENUE>                                            1,861
<INCOME-TAX-EXPENSE>                                                    79
<OTHER-OPERATING-EXPENSES>                                           1,544
<TOTAL-OPERATING-EXPENSES>                                           1,623
<OPERATING-INCOME-LOSS>                                                238
<OTHER-INCOME-NET>                                                       6
<INCOME-BEFORE-INTEREST-EXPEN>                                         244
<TOTAL-INTEREST-EXPENSE>                                               132
<NET-INCOME>                                                           112
<PREFERRED-STOCK-DIVIDENDS>                                              0
<EARNINGS-AVAILABLE-FOR-COMM>                                          112
<COMMON-STOCK-DIVIDENDS>                                               126
<TOTAL-INTEREST-ON-BONDS>                                              123
<CASH-FLOW-OPERATIONS>                                                 342
<EPS-BASIC>                                                           0.75
<EPS-DILUTED>                                                         0.75