<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated Marsh & McLennan Companies, Inc. and subsidiaries September 30,
1998 financial statements and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-END>                               SEP-30-1998
<CASH>                                     667,000,000
<SECURITIES>                                         0
<RECEIVABLES>                            1,704,000,000
<ALLOWANCES>                                68,000,000
<INVENTORY>                                          0
<CURRENT-ASSETS>                         2,846,000,000
<PP&E>                                   1,776,000,000
<DEPRECIATION>                             842,000,000
<TOTAL-ASSETS>                           8,728,000,000
<CURRENT-LIABILITIES>                    2,714,000,000
<BONDS>                                  1,280,000,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                   261,000,000
<OTHER-SE>                               3,316,000,000
<TOTAL-LIABILITY-AND-EQUITY>             8,728,000,000
<SALES>                                              0
<TOTAL-REVENUES>                         5,245,000,000
<CGS>                                                0
<TOTAL-COSTS>                            4,160,000,000
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                            16,000,000
<INTEREST-EXPENSE>                          94,000,000
<INCOME-PRETAX>                          1,008,000,000
<INCOME-TAX>                               398,000,000
<INCOME-CONTINUING>                        610,000,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               610,000,000
<EPS-PRIMARY>                                     2.38
<EPS-DILUTED>                                     2.28