Rio Bravo, TX has a population of 4,842 and is the 6,603rd largest city in the United States. The population density is 7,453 per sq mi which is 7588% higher than the Texas average and 8126% higher than the national average. The median age in Rio Bravo is 27 which is approximately 21% lower than the Texas average of 34. In Rio Bravo, 59% of the population over 15 years of age are married, 4% speak English and 96% speak Spanish. 65% of Rio Bravo residents were born in Texas, 5% were born out of state, 1% were born outside of the United States and 29% were foreign born.