Abernathy, TX has a population of 3,233 and is the 8,430th largest city in the United States. The population density is 1,184 per sq mi which is 1122% higher than the Texas average and 1207% higher than the national average. The median age in Abernathy is 38 which is approximately 12% higher than the Texas average of 34. In Abernathy, 68% of the population over 15 years of age are married, 71% speak English and 29% speak Spanish. 87% of Abernathy residents were born in Texas, 7% were born out of state, 0% were born outside of the United States and 6% were foreign born.