Effingham, KS -- U.S. city in Kansas Population (2000): 588 Housing Units (2000): 255 Land area (2000): 0.538526 sq. miles (1.394775 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.538526 sq. miles (1.394775 sq. km) FIPS code: 20025 Located within: Kansas (KS), FIPS 20 Location: 39.522774 N, 95.398633 W ZIP Codes (1990): 66023 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Effingham, KS Effingham