Oak Grove Heights, AR has a population of 930 and is the 15,594th largest city in the United States. The population density is 311 per sq mi which is 460% higher than the Arkansas average and 243% higher than the national average. The median age in Oak Grove Heights is 36 which is approximately 4% lower than the Arkansas average of 38. In Oak Grove Heights, 63% of the population over 15 years of age are married, 97% speak English and 3% speak Spanish. 71% of Oak Grove Heights residents were born in Arkansas, 28% were born out of state, 0% were born outside of the United States and 1% were foreign born.