Bennington, OK has a population of 304 and is the 22,428th largest city in the United States. The population density is 543 per sq mi which is 895% higher than the Oklahoma average and 499% higher than the national average. The median age in Bennington is 41 which is approximately 14% higher than the Oklahoma average of 36. In Bennington, 62% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 57% of Bennington residents were born in Oklahoma, 41% were born out of state, 2% were born outside of the United States and 0% were foreign born.