Gentryville, IN has a population of 348 and is the 21,648th largest city in the United States. The population density is 883 per sq mi which is 392% higher than the Indiana average and 875% higher than the national average. The median age in Gentryville is 35 which is approximately 7% lower than the Indiana average of 37. In Gentryville, 60% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 77% of Gentryville residents were born in Indiana, 22% were born out of state, 0% were born outside of the United States and 1% were foreign born.