what county is glasco ny in
Glasco, New York. Homefacts City Report. Glasco is located in Ulster County, NY. The population is 2,177, making Glasco the 7th largest city in Ulster County. There are 1 public schools in Glasco with an average Homefacts rating of A-. The total crime rate for Glasco is low, and there are 0 registered sex offenders residing in the city.