Quincy is located in Illinois. Quincy, Illinois has a population of 39,687. Quincy is less family-centric than the surrounding county with 25.79% of the households containing married families with children. The county average for households married with children is 27.52%.
The median household income in Quincy, Illinois is $50,857. The median household income for the surrounding county is $58,587 compared to the national median of $69,021. The median age of people living in Quincy is 40 years.
The average high temperature in July is 86.2 degrees, with an average low temperature in January of 18.4 degrees. The average rainfall is approximately 37.4 inches per year, with 17.7 inches of snow per year.
