Old Saybrook Center, Connecticut, United States [CDP]; population was 1,820 in 1990; housing units was 940 in 1990; location is 41°17'N 72°22'W; land area is 1.97 square miles (1,262 acres); water area is 0.93 square miles (594 acres); FIPS code is 57390 [SourceCBP]