Spring Hill, TN has a population of 34,364 and is the 1,229th largest city in the United States. The population density is 1,269 per sq mi which is 729% higher than the Tennessee average and 1301% higher than the national average. The median age in Spring Hill is 33 which is approximately 14% lower than the Tennessee average of 39. In Spring Hill, 67% of the population over 15 years of age are married, 92% speak English and 5% speak Spanish. 40% of Spring Hill residents were born in Tennessee, 52% were born out of state, 1% were born outside of the United States and 7% were foreign born.