Brinkley, AR has a population of 2,937 and is the 8,916th largest city in the United States. The population density is 523 per sq mi which is 844% higher than the Arkansas average and 478% higher than the national average. The median age in Brinkley is 43 which is approximately 14% higher than the Arkansas average of 38. In Brinkley, 45% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 74% of Brinkley residents were born in Arkansas, 24% were born out of state, 0% were born outside of the United States and 2% were foreign born.