Glasco, NY has a population of 2,590 and is the 9,635th largest city in the United States. The population density is 1,470 per sq mi which is 310% higher than the New York average and 1522% higher than the national average. The median age in Glasco is 40 which is approximately 5% higher than the New York average of 38. In Glasco, 48% of the population over 15 years of age are married, 87% speak English and 1% speak Spanish. 77% of Glasco residents were born in New York, 8% were born out of state, 0% were born outside of the United States and 15% were foreign born.