1 definition found calistoga - U.S. Gazetteer (1990) : Calistoga, CA (city, FIPS 9892) Location: 38.58145 N, 122.58166 W Population (1990): 4468 (2157 housing units) Area: 6.7 sq km (land), 0.0 sq km (water) Zip code(s): 94515