<ARTICLE> 5 <CIK> 0000791067 <NAME> GEODYNE ENERGY INCOME LIMITED PTRSHP I-C <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-START> JAN-01-1999 <PERIOD-END> SEP-30-1999 <CASH> 19,825 <SECURITIES> 0 <RECEIVABLES> 99,363 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 119,188 <PP&E> 3,659,027 <DEPRECIATION> 3,483,662 <TOTAL-ASSETS> 374,612 <CURRENT-LIABILITIES> 12,719 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 348,966 <TOTAL-LIABILITY-AND-EQUITY> 374,612 <SALES> 324,129 <TOTAL-REVENUES> 324,652 <CGS> 0 <TOTAL-COSTS> 220,893 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 103,759 <INCOME-TAX> 0 <INCOME-CONTINUING> 103,759 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 103,759 <EPS-BASIC> 11.01 <EPS-DILUTED> 0