Spartanburg, SC has a population of 37,570 and is the 1,104th largest city in the United States. The population density is 1,901 per sq mi which is 1188% higher than the South Carolina average and 1998% higher than the national average. The median age in Spartanburg is 35 which is approximately 9% lower than the South Carolina average of 39. In Spartanburg, 44% of the population over 15 years of age are married, 94% speak English and 3% speak Spanish. 68% of Spartanburg residents were born in South Carolina, 28% were born out of state, 1% were born outside of the United States and 4% were foreign born.