Mount Croghan, SC has a population of 130 and is the 26,157th largest city in the United States. The population density is 171 per sq mi which is 16% higher than the South Carolina average and 89% higher than the national average. The median age in Mount Croghan is 48 which is approximately 24% higher than the South Carolina average of 39. In Mount Croghan, 85% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 68% of Mount Croghan residents were born in South Carolina, 30% were born out of state, 0% were born outside of the United States and 2% were foreign born.