1 definition found earlsboro - U.S. Gazetteer (1990) : Earlsboro, OK (town, FIPS 22500) Location: 35.32576 N, 96.79802 W Population (1990): 535 (213 housing units) Area: 23.9 sq km (land), 0.0 sq km (water) Zip code(s): 74840