Ansonia, CT -- U.S. city in Connecticut Population (2000): 18554 Housing Units (2000): 7937 Land area (2000): 6.031251 sq. miles (15.620869 sq. km) Water area (2000): 0.159612 sq. miles (0.413392 sq. km) Total area (2000): 6.190863 sq. miles (16.034261 sq. km) FIPS code: 01150 Located within: Connecticut (CT), FIPS 09 Location: 41.342690 N, 73.074467 W ZIP Codes (1990): 06401 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Ansonia, CT Ansonia