1 definition found eastborough - U.S. Gazetteer (1990) : Eastborough, KS (city, FIPS 19300) Location: 37.68470 N, 97.25844 W Population (1990): 896 (370 housing units) Area: 1.0 sq km (land), 0.0 sq km (water) Zip code(s): 67206, 67207