Quanah, TX has a population of 2,483 and is the 9,900th largest city in the United States. The population density is 714 per sq mi which is 637% higher than the Texas average and 688% higher than the national average. The median age in Quanah is 41 which is approximately 20% higher than the Texas average of 34. In Quanah, 61% of the population over 15 years of age are married, 91% speak English and 9% speak Spanish. 74% of Quanah residents were born in Texas, 23% were born out of state, 0% were born outside of the United States and 2% were foreign born.