Quincy Real EstateQuincy is located in Illinois. Quincy, Illinois has a population of 40,587. Quincy is less family-centric than the surrounding county with 26.5% of the households containing married families with children. The county average for households married with children is 28.35%. The median household income in Quincy, Illinois is $42,854. The median household income for the surrounding county is $48,454 compared to the national median of $57,652. The median age of people living in Quincy is 39.9 years. Quincy WeatherThe average high temperature in July is 86.9 degrees, with an average low temperature in January of 19 degrees. The average rainfall is approximately 39 inches per year, with 19.7 inches of snow per year. Quincy MapReal estate near QuincyNearby CitiesNearby Cities Homes for Sale |