Katy, TX -- U.S. city in Texas Population (2000): 11775 Housing Units (2000): 4072 Land area (2000): 10.668177 sq. miles (27.630450 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 10.668177 sq. miles (27.630450 sq. km) FIPS code: 38476 Located within: Texas (TX), FIPS 48 Location: 29.792582 N, 95.822436 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Katy, TX Katy