1 definition found dunn - U.S. Gazetteer (1990) : Dunn, NC (city, FIPS 18320) Location: 35.31130 N, 78.61526 W Population (1990): 8336 (3638 housing units) Area: 13.5 sq km (land), 0.0 sq km (water) Zip code(s): 28334