1 definition found horicon - U.S. Gazetteer (1990) : Horicon, WI (city, FIPS 35750) Location: 43.44490 N, 88.63706 W Population (1990): 3873 (1478 housing units) Area: 8.4 sq km (land), 0.1 sq km (water) Zip code(s): 53032