1 definition found mandeville - U.S. Gazetteer (1990) : Mandeville, LA (city, FIPS 48225) Location: 30.37012 N, 90.08216 W Population (1990): 7083 (3105 housing units) Area: 11.2 sq km (land), 0.0 sq km (water) Zip code(s): 70448