Population.us

Population of Quincy, IL

Last official estimated population of Quincy city (Adams County**, Illinois state) was 40,805 (year 2014)^[1]. This was 0.013% of total US population and 0.32% of total Illinois state population. Area of Quincy city is 15.9 mi² (=41.2 km²)^[6], in this year population density was 2,565.06 p/mi². If population growth rate would be same as in period 2010-2014 (+0.11%/yr), Quincy city population in 2025 would be 41,282*.

Historical population

Historical population of Quincy city for period 1840-2014:

Quincy city on population map

Estimated population for 2014^[1]. Click on flag to hide it.

Population • Legends • Position

Settlements near Quincy city

• Hannibal city population 15.5 mi, 182°
• Palmyra city 12.2 mi, 220°
• Payson village 10.8 mi, 138°
• Mendon village 11.8 mi, 24°
• La Grange city 10.2 mi, 320°
• Ursa village 9.7 mi, 2°
• Liberty village 14.9 mi, 104°
• Plainville village 14.7 mi, 134°
• Coatsburg village 13.5 mi, 59°
• Columbus village 13 mi, 73°

Sources, notices

*Calculated by population.us from last known population growth rate, not official data.

**Some cities are placed on more than one county. Only 1 county is shown.

[1] Cities and Towns (Incorporated Places and Minor Civil Divisions) 2014, archived from the original, retrieved 02/23/2016

[2] City and Town Intercensal Estimates (2000-2010), archived from the original, retrieved 02/23/2016

[3] Places: 1990 and 1999 Populations, With Numeric and Percent Population Change, archived from the original, retrieved 02/23/2016

[4] Population of the 100 Largest Urban Places: 1980,

[5] Population of the 100 Largest Urban Places in history,

[6] Area, latitude longitude data, retrieved 02/23/2016

[7] Through the Decades, Overview 1790-2010, PDF, large files! >100 Mb