<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE BALANCE
SHEET OF KMC TELECOM HOLDINGS, INC. AS OF SEPTEMBER 30, 2000 AND THE RELATED
STATEMENT OF OPERATIONS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2000, AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C>
<PERIOD-TYPE> 9-MOS
<FISCAL-YEAR-END> Dec-31-2000
<PERIOD-START> Jan-1-2000
<PERIOD-END> Sep-30-2000
<CASH> 128,520,000
<SECURITIES> 0
<RECEIVABLES> 56,398,000
<ALLOWANCES> (7,665,000)
<INVENTORY> 0
<CURRENT-ASSETS> 391,243,000
<PP&E> 930,760,000
<DEPRECIATION> (87,899,000)
<TOTAL-ASSETS> 1,363,780,000
<CURRENT-LIABILITIES> 344,691,000
<BONDS> 604,933,000
513,196,000
0
<COMMON> 6,000
<OTHER-SE> (715,167,000)
<TOTAL-LIABILITY-AND-EQUITY> 1,363,780,000
<SALES> 0
<TOTAL-REVENUES> 129,025,000
<CGS> 0
<TOTAL-COSTS> 112,234,000
<OTHER-EXPENSES> 201,213,000
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 94,473,000
<INCOME-PRETAX> (270,605,000)
<INCOME-TAX> 0
<INCOME-CONTINUING> (270,605,000)
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> (1,705,000)
<NET-INCOME> (272,310,000)
<EPS-BASIC> (402.51)
<EPS-DILUTED> (402.51)
</TABLE>