1 definition found knightstown - U.S. Gazetteer (1990) : Knightstown, IN (town, FIPS 40266) Location: 39.79569 N, 85.52829 W Population (1990): 2048 (931 housing units) Area: 1.8 sq km (land), 0.0 sq km (water) Zip code(s): 46148