1 definition found mount croghan - U.S. Gazetteer (1990) : Mount Croghan, SC (town, FIPS 48355) Location: 34.76931 N, 80.22514 W Population (1990): 131 (62 housing units) Area: 2.0 sq km (land), 0.0 sq km (water) Zip code(s): 29727