Richland Hills, TX has a population of 8,033 and is the 4,666th largest city in the United States. The population density is 2,562 per sq mi which is 2543% higher than the Texas average and 2728% higher than the national average. The median age in Richland Hills is 42 which is approximately 23% higher than the Texas average of 34. In Richland Hills, 53% of the population over 15 years of age are married, 79% speak English and 17% speak Spanish. 63% of Richland Hills residents were born in Texas, 24% were born out of state, 1% were born outside of the United States and 12% were foreign born.