<ARTICLE> 5
<LEGEND>
                     This schedule contains summary financial 
                     information extracted from the consolidated 
                     Marsh & McLennan Companies, Inc. and subsidiaries 
                     March 31, 1999 financial statements and is 
                     qualified in its entirety by reference to such 
                     financial statements.
</LEGEND>
       
                                       
<PERIOD-TYPE>                              3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               MAR-31-1999
<CASH>                                     590,000,000
<SECURITIES>                                         0
<RECEIVABLES>                            2,125,000,000
<ALLOWANCES>                                90,000,000
<INVENTORY>                                          0
<CURRENT-ASSETS>                         3,357,000,000
<PP&E>                                   2,050,000,000
<DEPRECIATION>                             810,000,000
<TOTAL-ASSETS>                          11,869,000,000
<CURRENT-LIABILITIES>                    4,840,000,000
<BONDS>                                  1,564,000,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                   260,000,000
<OTHER-SE>                               3,499,000,000
<TOTAL-LIABILITY-AND-EQUITY>            11,869,000,000
<SALES>                                              0
<TOTAL-REVENUES>                         2,351,000,000
<CGS>                                                0
<TOTAL-COSTS>                            1,832,000,000
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                             2,000,000
<INTEREST-EXPENSE>                          60,000,000
<INCOME-PRETAX>                            466,000,000
<INCOME-TAX>                               187,000,000
<INCOME-CONTINUING>                        279,000,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               279,000,000
<EPS-PRIMARY>                                     1.08
<EPS-DILUTED>                                     1.03