Baldwin City, KS -- U.S. city in Kansas Population (2000): 3400 Housing Units (2000): 1165 Land area (2000): 2.172331 sq. miles (5.626310 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.172331 sq. miles (5.626310 sq. km) FIPS code: 03900 Located within: Kansas (KS), FIPS 20 Location: 38.777597 N, 95.187418 W ZIP Codes (1990): 66006 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Baldwin City, KS Baldwin City