Harrison, AR has a population of 13,168 and is the 3,171st largest city in the United States. The population density is 1,177 per sq mi which is 2023% higher than the Arkansas average and 1199% higher than the national average. The median age in Harrison is 37 which is approximately 1% lower than the Arkansas average of 38. In Harrison, 55% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 56% of Harrison residents were born in Arkansas, 42% were born out of state, 0% were born outside of the United States and 1% were foreign born.