<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORRESTER
RESEARCH INC'S JUNE 30, 1998 CONSOLIDATED FINANCIAL STATEMENTS AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS CONTAINED IN FORM
10-K.
</LEGEND>
<CIK> 0001023313
<NAME> FORRESTER RESEARCH, INC.
<CURRENCY> U.S. DOLLARS
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             APR-01-1998
<PERIOD-END>                               JUN-30-1998
<EXCHANGE-RATE>                                      1
<CASH>                                       2,809,348
<SECURITIES>                                54,509,167
<RECEIVABLES>                               13,977,542
<ALLOWANCES>                                   350,000
<INVENTORY>                                          0
<CURRENT-ASSETS>                            75,487,515
<PP&E>                                      10,582,116
<DEPRECIATION>                               3,241,433
<TOTAL-ASSETS>                              82,828,198
<CURRENT-LIABILITIES>                       36,901,100
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        85,284
<OTHER-SE>                                  45,841,804
<TOTAL-LIABILITY-AND-EQUITY>                82,828,198
<SALES>                                              0
<TOTAL-REVENUES>                            15,043,432
<CGS>                                                0
<TOTAL-COSTS>                                5,781,744
<OTHER-EXPENSES>                             7,368,339
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                              2,608,435
<INCOME-TAX>                                   991,205
<INCOME-CONTINUING>                          1,617,230
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 1,617,230
<EPS-PRIMARY>                                      .19
<EPS-DILUTED>                                      .17