1 definition found kenai - U.S. Gazetteer (1990) : Kenai, AK (city, FIPS 38420) Location: 60.55374 N, 151.20742 W Population (1990): 6327 (2681 housing units) Area: 67.9 sq km (land), 14.1 sq km (water) Zip code(s): 99611