Gambier, OH has a population of 2,469 and is the 9,931st largest city in the United States. The population density is 2,639 per sq mi which is 925% higher than the Ohio average and 2813% higher than the national average. The median age in Gambier is 21 which is approximately 47% lower than the Ohio average of 39. In Gambier, 15% of the population over 15 years of age are married, 91% speak English and 4% speak Spanish. 37% of Gambier residents were born in Ohio, 59% were born out of state, 0% were born outside of the United States and 3% were foreign born.