<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED MARSH & MCLENNAN COMPANIES, INC. AND SUBSIDIARIES DECEMBER 31, 1999
FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                     428,000,000
<SECURITIES>                                         0
<RECEIVABLES>                            2,455,000,000
<ALLOWANCES>                               132,000,000
<INVENTORY>                                          0
<CURRENT-ASSETS>                         3,283,000,000
<PP&E>                                   2,212,000,000
<DEPRECIATION>                             898,000,000
<TOTAL-ASSETS>                          13,021,000,000
<CURRENT-LIABILITIES>                    4,318,000,000
<BONDS>                                  2,357,000,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                   269,000,000
<OTHER-SE>                               3,901,000,000
<TOTAL-LIABILITY-AND-EQUITY>            13,021,000,000
<SALES>                                              0
<TOTAL-REVENUES>                         9,157,000,000
<CGS>                                                0
<TOTAL-COSTS>                            7,698,000,000
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                            18,000,000
<INTEREST-EXPENSE>                         233,000,000
<INCOME-PRETAX>                          1,247,000,000
<INCOME-TAX>                               521,000,000
<INCOME-CONTINUING>                        726,000,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               726,000,000
<EPS-BASIC>                                       2.76
<EPS-DILUTED>                                     2.62