Gann, OH has a population of 127 and is the 26,224th largest city in the United States. The population density is 680 per sq mi which is 164% higher than the Ohio average and 650% higher than the national average. The median age in Gann is 45 which is approximately 15% higher than the Ohio average of 39. In Gann, 39% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 87% of Gann residents were born in Ohio, 13% were born out of state, 0% were born outside of the United States and 0% were foreign born.