Oil Trough, AR has a population of 222 and is the 23,976th largest city in the United States. The population density is 970 per sq mi which is 1650% higher than the Arkansas average and 971% higher than the national average. The median age in Oil Trough is 35 which is approximately 7% lower than the Arkansas average of 38. In Oil Trough, 59% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 82% of Oil Trough residents were born in Arkansas, 18% were born out of state, 0% were born outside of the United States and 0% were foreign born.