<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted from the
consolidated Marsh & McLennan Companies, Inc. and subsidiaries June 30, 1997
financial statements and is qualified in its entirety by reference to such
financial statements.
</LEGEND>
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                     500,400,000
<SECURITIES>                                         0
<RECEIVABLES>                            1,459,500,000
<ALLOWANCES>                                44,300,000
<INVENTORY>                                          0
<CURRENT-ASSETS>                         2,375,700,000
<PP&E>                                   1,711,700,000
<DEPRECIATION>                             742,600,000
<TOTAL-ASSETS>                           7,456,800,000
<CURRENT-LIABILITIES>                    2,134,200,000
<BONDS>                                  1,110,500,000
<COMMON>                                   173,200,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                               3,009,600,000
<TOTAL-LIABILITY-AND-EQUITY>             7,456,800,000
<SALES>                                              0
<TOTAL-REVENUES>                         2,658,500,000
<CGS>                                                0
<TOTAL-COSTS>                            2,119,600,000
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                          48,900,000
<INCOME-PRETAX>                            501,000,000
<INCOME-TAX>                               191,600,000
<INCOME-CONTINUING>                        309,400,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               309,400,000
<EPS-PRIMARY>                                     1.97
<EPS-DILUTED>                                     1.97