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

                                        
<PERIOD-TYPE>                                    6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUN-30-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                  168,849,009
<OTHER-PROPERTY-AND-INVEST>                  4,059,779
<TOTAL-CURRENT-ASSETS>                      22,288,975
<TOTAL-DEFERRED-CHARGES>                    12,780,305
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                             207,978,068
<COMMON>                                    46,068,722
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                         22,184,943
<TOTAL-COMMON-STOCKHOLDERS-EQ>              68,253,665
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                  4,995,635
<LONG-TERM-DEBT-NET>                        77,991,326
<SHORT-TERM-NOTES>                                   0
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                   89,083
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>              56,648,359
<TOT-CAPITALIZATION-AND-LIAB>              207,978,068
<GROSS-OPERATING-REVENUE>                   25,492,681
<INCOME-TAX-EXPENSE>                         1,562,280
<OTHER-OPERATING-EXPENSES>                  19,003,541
<TOTAL-OPERATING-EXPENSES>                  20,565,821
<OPERATING-INCOME-LOSS>                      4,926,860
<OTHER-INCOME-NET>                           1,459,840
<INCOME-BEFORE-INTEREST-EXPEN>               6,386,700
<TOTAL-INTEREST-EXPENSE>                     2,321,470
<NET-INCOME>                                 4,065,230
<PREFERRED-STOCK-DIVIDENDS>                    159,393
<EARNINGS-AVAILABLE-FOR-COMM>                3,905,837
<COMMON-STOCK-DIVIDENDS>                     2,893,889
<TOTAL-INTEREST-ON-BONDS>                    4,166,712
<CASH-FLOW-OPERATIONS>                       2,398,276
<EPS-BASIC>                                     0.80
<EPS-DILUTED>                                     0.79