Oswego, KS -- U.S. city in Kansas Population (2000): 2046 Housing Units (2000): 890 Land area (2000): 2.138194 sq. miles (5.537898 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.138194 sq. miles (5.537898 sq. km) FIPS code: 53450 Located within: Kansas (KS), FIPS 20 Location: 37.167728 N, 95.109453 W ZIP Codes (1990): 67356 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Oswego, KS Oswego