1 definition found mount kisco - U.S. Gazetteer (1990) : Mount Kisco, NY (village, FIPS 48890) Location: 41.20183 N, 73.73047 W Population (1990): 9108 (3965 housing units) Area: 8.1 sq km (land), 0.0 sq km (water) Zip code(s): 10549