Sylvia, KS -- U.S. city in Kansas Population (2000): 297 Housing Units (2000): 142 Land area (2000): 0.287091 sq. miles (0.743563 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.287091 sq. miles (0.743563 sq. km) FIPS code: 69800 Located within: Kansas (KS), FIPS 20 Location: 37.957673 N, 98.408878 W ZIP Codes (1990): 67581 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Sylvia, KS Sylvia