<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from Swift Energy
Income Partners 1989-B LTD's balance sheet and statement of operations
contained in its Form 10-Q for the quarter ended June 30, 1996.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-END>                               JUN-30-1996
<CASH>                                         110,139
<SECURITIES>                                         0
<RECEIVABLES>                                  478,966
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                               589,105
<PP&E>                                       8,379,141
<DEPRECIATION>                              (4,792,622)
<TOTAL-ASSETS>                               4,314,251
<CURRENT-LIABILITIES>                           26,452
<BONDS>                                              0
<COMMON>                                             0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                   4,216,230
<TOTAL-LIABILITY-AND-EQUITY>                 4,314,251
<SALES>                                        972,800
<TOTAL-REVENUES>                               984,350
<CGS>                                                0
<TOTAL-COSTS>                                  512,129<F1>
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 395
<INCOME-PRETAX>                                397,889
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                            397,889
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   397,889
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0
<FN>
<F1>Includes lease operating expense, production taxes and depreciation depletion
and amortization expense. Excludes general and administrative and interest
expense.
</FN>