Liberty, TX has a population of 8,936 and is the 4,293rd largest city in the United States. The population density is 220 per sq mi which is 127% higher than the Texas average and 143% higher than the national average. The median age in Liberty is 37 which is approximately 7% higher than the Texas average of 34. In Liberty, 67% of the population over 15 years of age are married, 77% speak English and 22% speak Spanish. 67% of Liberty residents were born in Texas, 23% were born out of state, 0% were born outside of the United States and 10% were foreign born.