Brookville, OH has a population of 5,993 and is the 5,763rd largest city in the United States. The population density is 1,566 per sq mi which is 508% higher than the Ohio average and 1628% higher than the national average. The median age in Brookville is 44 which is approximately 12% higher than the Ohio average of 39. In Brookville, 67% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 83% of Brookville residents were born in Ohio, 15% were born out of state, 1% were born outside of the United States and 1% were foreign born.