Quinlan, TX has a population of 1,735 and is the 11,869th largest city in the United States. The population density is 1,342 per sq mi which is 1284% higher than the Texas average and 1381% higher than the national average. The median age in Quinlan is 41 which is approximately 20% higher than the Texas average of 34. In Quinlan, 59% of the population over 15 years of age are married, 82% speak English and 17% speak Spanish. 77% of Quinlan residents were born in Texas, 16% were born out of state, 0% were born outside of the United States and 6% were foreign born.