North Vernon, IN has a population of 7,134 and is the 5,115th largest city in the United States. The population density is 912 per sq mi which is 408% higher than the Indiana average and 907% higher than the national average. The median age in North Vernon is 38 which is approximately 1% higher than the Indiana average of 37. In North Vernon, 52% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 73% of North Vernon residents were born in Indiana, 26% were born out of state, 1% were born outside of the United States and 1% were foreign born.