Gantt, SC has a population of 14,788 and is the 2,871st largest city in the United States. The population density is 1,511 per sq mi which is 924% higher than the South Carolina average and 1567% higher than the national average. The median age in Gantt is 35 which is approximately 10% lower than the South Carolina average of 39. In Gantt, 47% of the population over 15 years of age are married, 90% speak English and 10% speak Spanish. 74% of Gantt residents were born in South Carolina, 20% were born out of state, 1% were born outside of the United States and 6% were foreign born.