<TABLE> <S> <C>
<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
<S> <C>
<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
0
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
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
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
</TABLE>