Glenville, CT has a population of 2,302 and is the 10,251st largest city in the United States. The population density is 3,114 per sq mi which is 381% higher than the Connecticut average and 3337% higher than the national average. The median age in Glenville is 48 which is approximately 19% higher than the Connecticut average of 41. In Glenville, 62% of the population over 15 years of age are married, 82% speak English and 4% speak Spanish. 23% of Glenville residents were born in Connecticut, 58% were born out of state, 1% were born outside of the United States and 18% were foreign born.