Three Rivers, TX has a population of 1,867 and is the 11,428th largest city in the United States. The population density is 1,276 per sq mi which is 1216% higher than the Texas average and 1308% higher than the national average. The median age in Three Rivers is 32 which is approximately 5% lower than the Texas average of 34. In Three Rivers, 57% of the population over 15 years of age are married, 62% speak English and 30% speak Spanish. 73% of Three Rivers residents were born in Texas, 20% were born out of state, 0% were born outside of the United States and 7% were foreign born.