1 definition found duchesne - U.S. Gazetteer (1990) : Duchesne, UT (city, FIPS 20340) Location: 40.17543 N, 110.39247 W Population (1990): 1308 (529 housing units) Area: 6.0 sq km (land), 0.0 sq km (water) Zip code(s): 84021