<ARTICLE> UT
<CIK> 0000066004
<NAME> MIDDLESEX WATER COMPANY

                                        
<PERIOD-TYPE>                                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                  179,721,639
<OTHER-PROPERTY-AND-INVEST>                  2,087,498
<TOTAL-CURRENT-ASSETS>                      21,072,182
<TOTAL-DEFERRED-CHARGES>                    12,154,346
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                             215,035,665
<COMMON>                                    47,593,514
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                         22,895,844
<TOTAL-COMMON-STOCKHOLDERS-EQ>              70,489,358
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                  4,063,063
<LONG-TERM-DEBT-NET>                        82,329,592
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                  201,921
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>              57,951,732
<TOT-CAPITALIZATION-AND-LIAB>              215,035,665
<GROSS-OPERATING-REVENUE>                   53,497,153
<INCOME-TAX-EXPENSE>                         3,188,893
<OTHER-OPERATING-EXPENSES>                  39,642,781
<TOTAL-OPERATING-EXPENSES>                  42,831,674
<OPERATING-INCOME-LOSS>                     10,665,479
<OTHER-INCOME-NET>                           1,911,007
<INCOME-BEFORE-INTEREST-EXPEN>              12,576,486
<TOTAL-INTEREST-EXPENSE>                     4,695,445
<NET-INCOME>                                 7,881,041
<PREFERRED-STOCK-DIVIDENDS>                    300,786
<EARNINGS-AVAILABLE-FOR-COMM>                7,580,255
<COMMON-STOCK-DIVIDENDS>                     5,857,405
<TOTAL-INTEREST-ON-BONDS>                    4,290,086
<CASH-FLOW-OPERATIONS>                      10,039,816
<EPS-BASIC>                                       1.54
<EPS-DILUTED>                                     1.52