Sweetwater, TX has a population of 10,765 and is the 3,734th largest city in the United States. The population density is 972 per sq mi which is 903% higher than the Texas average and 973% higher than the national average. The median age in Sweetwater is 36 which is approximately 5% higher than the Texas average of 34. In Sweetwater, 59% of the population over 15 years of age are married, 72% speak English and 26% speak Spanish. 82% of Sweetwater residents were born in Texas, 15% were born out of state, 0% were born outside of the United States and 4% were foreign born.