<ARTICLE> 5
<CIK> 0000104894
<NAME> WASHINGTON REAL ESTATE INVESTMENT TRUST
<MULTIPLIER> 1000
<CURRENCY> U.S. DOLLARS

                                                  
<PERIOD-TYPE>                   3-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1999             DEC-31-1999
<PERIOD-START>                             JUL-01-1999             JAN-01-1999
<PERIOD-END>                               SEP-30-1999             SEP-30-1999
<EXCHANGE-RATE>                                      1                       1
<CASH>                                            1936                    1936
<SECURITIES>                                         0                       0
<RECEIVABLES>                                     5138                    5138
<ALLOWANCES>                                       914                     914
<INVENTORY>                                          0                       0
<CURRENT-ASSETS>                                 20082                   20082
<PP&E>                                          654094                  654094
<DEPRECIATION>                                   78114                   78114
<TOTAL-ASSETS>                                  602222                  602222
<CURRENT-LIABILITIES>                            47728                   47728
<BONDS>                                         297208                  297208
<PREFERRED-MANDATORY>                                0                       0
<PREFERRED>                                          0                       0
<COMMON>                                           357                     357
<OTHER-SE>                                      256929                  256929
<TOTAL-LIABILITY-AND-EQUITY>                    602222                  602222
<SALES>                                          29566                   86084
<TOTAL-REVENUES>                                 29650                   86605
<CGS>                                            13790                  39,985
<TOTAL-COSTS>                                    13790                  39,985
<OTHER-EXPENSES>                                  1571                    4510
<LOSS-PROVISION>                                     0                       0
<INTEREST-EXPENSE>                                5463                   16070
<INCOME-PRETAX>                                   8826                   26040
<INCOME-TAX>                                         0                       0
<INCOME-CONTINUING>                               8826                  33,949
<DISCONTINUED>                                       0                       0
<EXTRAORDINARY>                                      0                       0
<CHANGES>                                            0                       0
<NET-INCOME>                                      8826                  33,949
<EPS-BASIC>                                       0.25                    0.95
<EPS-DILUTED>                                     0.25                    0.95