1 definition found westmorland - U.S. Gazetteer (1990) : Westmorland, CA (city, FIPS 84606) Location: 33.03677 N, 115.62147 W Population (1990): 1380 (432 housing units) Area: 1.0 sq km (land), 0.0 sq km (water) Zip code(s): 92281