Map of Quincy, Illinois, United States

Quincy is a city in Illinois, United States, with a population of about 40,780. It lies at 39.9356°N, 91.4099°W, about 173 m above sea level. Quincy is about 1,239 km (770 mi) west of Washington, D.C., the capital. The nearest city on our map is Wentzville, 134 km to the south.

Quincy at a glance

Where is Quincy?

• Located in the Northern and Western hemispheres.
• Daylight ranges from about 9 h 20 min on the shortest day to 15 h 00 min on the longest day (around 21 December and 21 June).

Cities near Quincy

• Wentzville — 134 km south
• Columbia — 135 km southwest
• O'Fallon — 139 km southeast
• Saint Peters — 143 km southeast
• Saint Charles — 151 km southeast
• Florissant — 158 km southeast
• Chesterfield — 159 km southeast
• Wildwood — 164 km southeast
• Jefferson City — 165 km southwest
• University City — 171 km southeast

Largest cities in Illinois

• Chicago — 2,664,452
• Aurora — 200,661
• Rockford — 148,278
• Joliet — 147,861
• Naperville — 147,100
• Peoria — 115,070
• Springfield — 114,394
• Elgin — 112,111
• Waukegan — 88,475
• Champaign — 86,096

Largest cities in United States

• New York City — 8,804,190
• Los Angeles — 3,820,914
• Brooklyn — 2,736,074
• Chicago — 2,664,452
• Queens — 2,316,841
• Houston — 2,314,157
• Phoenix — 1,650,070
• Philadelphia — 1,573,916
• San Antonio — 1,526,656
• Manhattan — 1,487,536

Map of United States and all its cities →

Other places named Quincy

• Quincy — Massachusetts, United States

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.