Brownsville, OH has a population of 20 and is the 28,770th largest city in the United States. The population density is 22 per sq mi which is 91% lower than the Ohio average and 75% lower than the national average. The median age in Brownsville is 0 which is approximately 100% lower than the Ohio average of 39. In Brownsville, 0% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 0% of Brownsville residents were born in Ohio, 100% were born out of state, 0% were born outside of the United States and 0% were foreign born.