<ARTICLE>                      5
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED BALANCE SHEET AND STATEMENT OF OPERATIONS
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
<CIK>                           0000712770
<NAME>                          ONE LIBERTY PROPERTIES, INC.
<MULTIPLIER>                    1000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>               DEC-31-1999
<PERIOD-END>                    SEP-30-1999
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<SECURITIES>                              0
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<CURRENT-LIABILITIES>                     0
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<PREFERRED-MANDATORY>                10,850
<PREFERRED>                               0
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<OTHER-SE>                           36,057
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<SALES>                                   0
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<CGS>                                     0
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<INCOME-TAX>                              0
<INCOME-CONTINUING>                   3,874
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<EXTRAORDINARY>                           0
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<NET-INCOME>                          3,874
<EPS-BASIC>                           .98
<EPS-DILUTED>                           .98