Austin, AR has a population of 3,108 and is the 8,628th largest city in the United States. The population density is 1,063 per sq mi which is 1817% higher than the Arkansas average and 1073% higher than the national average. The median age in Austin is 29 which is approximately 23% lower than the Arkansas average of 38. In Austin, 76% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 50% of Austin residents were born in Arkansas, 42% were born out of state, 3% were born outside of the United States and 6% were foreign born.