<ARTICLE>                     5
<LEGEND>
     THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED CONDENSED FINANCIAL STATEMENTS OF OMNICOM GROUP INC. AND
SUBSIDIARIES AS OF AND FOR THE SIX MONTHS ENDED JUNE 30, 1997 AND IS QUALIFIED
IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>                                   1,000
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                             DEC-31-1997
<PERIOD-END>                                  JUN-30-1997
<CASH>                                            294,028
<SECURITIES>                                       95,471
<RECEIVABLES>                                   1,711,974
<ALLOWANCES>                                       26,232
<INVENTORY>                                             0
<CURRENT-ASSETS>                                2,514,854
<PP&E>                                            546,039
<DEPRECIATION>                                    317,156
<TOTAL-ASSETS>                                  4,341,491
<CURRENT-LIABILITIES>                           2,739,527
<BONDS>                                           545,014
<PREFERRED-MANDATORY>                                   0
<PREFERRED>                                             0
<COMMON>                                           43,417
<OTHER-SE>                                        798,108
<TOTAL-LIABILITY-AND-EQUITY>                    4,341,491
<SALES>                                                 0
<TOTAL-REVENUES>                                1,482,918
<CGS>                                                   0
<TOTAL-COSTS>                                     865,685
<OTHER-EXPENSES>                                  420,369
<LOSS-PROVISION>                                    3,160
<INTEREST-EXPENSE>                                  9,310
<INCOME-PRETAX>                                   187,554
<INCOME-TAX>                                       76,311
<INCOME-CONTINUING>                               106,467
<DISCONTINUED>                                          0
<EXTRAORDINARY>                                         0
<CHANGES>                                               0
<NET-INCOME>                                      106,467
<EPS-PRIMARY>                                        1.31
<EPS-DILUTED>                                        1.31