Quincy is located in Adams County, IL. The population is 40,745, making Quincy the largest city in Adams County.
There are 14 public schools in Quincy with an average Homefacts rating of C+. The total crime rate for Quincy is high , and there are 3 registered sex offenders residing in the city. Unemployment in Quincy is moderate and the median home sales price is $0. Detailed and up-to-date Quincy property reports are available for any property address.
Cities near Quincy include Quincy Township, Melrose Township and Ellington Township.