Tega Cay, SC has a population of 9,026 and is the 4,253rd largest city in the United States. The population density is 2,005 per sq mi which is 1259% higher than the South Carolina average and 2113% higher than the national average. The median age in Tega Cay is 41 which is approximately 5% higher than the South Carolina average of 39. In Tega Cay, 72% of the population over 15 years of age are married, 92% speak English and 2% speak Spanish. 12% of Tega Cay residents were born in South Carolina, 81% were born out of state, 1% were born outside of the United States and 6% were foreign born.