Blytheville, AR has a population of 14,849 and is the 2,860th largest city in the United States. The population density is 720 per sq mi which is 1197% higher than the Arkansas average and 694% higher than the national average. The median age in Blytheville is 35 which is approximately 7% lower than the Arkansas average of 38. In Blytheville, 49% of the population over 15 years of age are married, 96% speak English and 4% speak Spanish. 66% of Blytheville residents were born in Arkansas, 32% were born out of state, 0% were born outside of the United States and 3% were foreign born.