1 definition found kirksville - U.S. Gazetteer (1990) : Kirksville, MO (city, FIPS 39026) Location: 40.19511 N, 92.57843 W Population (1990): 17152 (6927 housing units) Area: 25.4 sq km (land), 0.1 sq km (water) Zip code(s): 63501