<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from Swift Energy
Income Partners 1990-C, Ltd.'s balance sheet and statement of operations con-
tained in its Form 10-K for the year ended December 31, 1996 and is qualified in
its entirety by reference to such financial statements.
</LEGEND>
       
                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                              DEC-31-1996
<PERIOD-END>                                   DEC-31-1996
<CASH>                                         1,129
<SECURITIES>                                   0
<RECEIVABLES>                                  137,626
<ALLOWANCES>                                   0
<INVENTORY>                                    0
<CURRENT-ASSETS>                               138,755
<PP&E>                                         5,849,487
<DEPRECIATION>                                 (4,800,974)
<TOTAL-ASSETS>                                 1,205,615
<CURRENT-LIABILITIES>                          282,699
<BONDS>                                        0
<PREFERRED-MANDATORY>                          0
<PREFERRED>                                    0
<COMMON>                                       0
<OTHER-SE>                                     899,648
<TOTAL-LIABILITY-AND-EQUITY>                   1,205,615
<SALES>                                        668,937
<TOTAL-REVENUES>                               672,124
<CGS>                                          0
<TOTAL-COSTS>                                  479,234<F1>
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             0
<INCOME-PRETAX>                                65,688
<INCOME-TAX>                                   0
<INCOME-CONTINUING>                            65,688
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   65,688
<EPS-PRIMARY>                                  0
<EPS-DILUTED>                                  0
<FN>
<F1>Includes lease operating expenses, production taxes and depreciation,
depletion and amortization expense.  Excludes general and administrative and
interest expense.
</FN>