<TABLE> <S> <C>
<PAGE>
<ARTICLE> UT
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
BALANCE SHEET, INCOME STATEMENT AND STATEMENT OF CASH FLOWS FOR CONSOLIDATED
EDISON COMPANY OF NEW YORK, INC. AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS AND THE NOTES THERETO.
</LEGEND>
<CIK> 0000023632
<NAME> CONSOLIDATED EDISON COMPANY OF NEW YORK, INC.
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> SEP-30-2000
<BOOK-VALUE> PER-BOOK
<TOTAL-NET-UTILITY-PLANT> 10,902,056
<OTHER-PROPERTY-AND-INVEST> 359,957
<TOTAL-CURRENT-ASSETS> 1,524,458
<TOTAL-DEFERRED-CHARGES> 1,573,592
<OTHER-ASSETS> 0
<TOTAL-ASSETS> 14,360,063
<COMMON> 588,720
<CAPITAL-SURPLUS-PAID-IN> 857,737
<RETAINED-EARNINGS> 4,056,978
<TOTAL-COMMON-STOCKHOLDERS-EQ> 4,541,343
37,050
212,563
<LONG-TERM-DEBT-NET> 4,716,901
<SHORT-TERM-NOTES> 0
<LONG-TERM-NOTES-PAYABLE> 0
<COMMERCIAL-PAPER-OBLIGATIONS> 164,969
<LONG-TERM-DEBT-CURRENT-PORT> 150,000
0
<CAPITAL-LEASE-OBLIGATIONS> 32,184
<LEASES-CURRENT> 2,720
<OTHER-ITEMS-CAPITAL-AND-LIAB> 4,502,333
<TOT-CAPITALIZATION-AND-LIAB> 14,360,063
<GROSS-OPERATING-REVENUE> 6,107,202
<INCOME-TAX-EXPENSE> 251,184
<OTHER-OPERATING-EXPENSES> 5,061,785
<TOTAL-OPERATING-EXPENSES> 5,312,969
<OPERATING-INCOME-LOSS> 794,233
<OTHER-INCOME-NET> 5,956
<INCOME-BEFORE-INTEREST-EXPEN> 800,189
<TOTAL-INTEREST-EXPENSE> 274,256
<NET-INCOME> 525,933
10,194
<EARNINGS-AVAILABLE-FOR-COMM> 515,739
<COMMON-STOCK-DIVIDENDS> 346,754
<TOTAL-INTEREST-ON-BONDS> 243,532
<CASH-FLOW-OPERATIONS> 713,288
<EPS-BASIC> 0
<EPS-DILUTED> 0
</TABLE>
