Bolivar, OH has a population of 1,070 and is the 14,723rd largest city in the United States. The population density is 1,541 per sq mi which is 498% higher than the Ohio average and 1601% higher than the national average. The median age in Bolivar is 44 which is approximately 13% higher than the Ohio average of 39. In Bolivar, 64% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 83% of Bolivar residents were born in Ohio, 14% were born out of state, 0% were born outside of the United States and 3% were foreign born.