<TABLE> <S> <C>
<ARTICLE> 5
<CIK> 0000803095
<NAME> DYCO OIL AND GAS PROGRAM 1986-X
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<CASH> 32,164
<SECURITIES> 0
<RECEIVABLES> 25,351
<ALLOWANCES> 0
<INVENTORY> 0
<CURRENT-ASSETS> 57,515
<PP&E> 9,219,863
<DEPRECIATION> 9,159,466
<TOTAL-ASSETS> 131,094
<CURRENT-LIABILITIES> 14,949
<BONDS> 0
0
0
<COMMON> 0
<OTHER-SE> 98,280
<TOTAL-LIABILITY-AND-EQUITY> 131,094
<SALES> 70,605
<TOTAL-REVENUES> 70,995
<CGS> 0
<TOTAL-COSTS> 49,638
<OTHER-EXPENSES> 0
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> 0
<INCOME-PRETAX> 21,357
<INCOME-TAX> 0
<INCOME-CONTINUING> 21,357
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 21,357
<EPS-BASIC> 10.57
<EPS-DILUTED> 0
</TABLE>