Quincy, IL Profile: Facts & Data

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Quincy, Illinois - Basic Facts

The City of Quincy had a population of 40,157 as of July 1, 2018. Quincy ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Quincy is located at latitude 39.9337 and longitude -91.3793 in Adams County. The formal boundaries for the City of Quincy (see map below) encompass a land area of 15.87 sq. miles and a water area of 0.04 sq. miles. Adams County is in the Central time zone (GMT -6). The elevation is 568 feet.

The City of Quincy (GNIS ID: 2396301) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The City of Quincy is located within Township of Quincy, a minor civil division (MCD) of Adams County.

Alternate Unofficial Names for Quincy: Bluffs, Gem City.

Jump to... (On This Page!)
  1. Quincy 2018 Demographic Data
  2. Growth Rates for Quincy (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. Illinois Research Tools (Easy Tools & Current Data)
  3. Illinois Data Comparison Tool - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


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Quincy, IL Data & Demographics (As of July 1, 2018)

POPULATION

Total Population 40,157
Population in Households 38,125
Population in Familes 28,630
Population in Group Qrtrs 2,032
Population Density2 2,530
Diversity Index3 23
 

INCOME

Median Household Income $45,190
Average Household Income $60,520
Per Capita Income $25,999

HOUSING

Total Housing Units 18,894 (100%)
Owner Occupied HU 11,204 (59.3%)
Renter Occupied HU 5,758 (30.5%)
Vacant Housing Units 1,932 (10.2%)
Median Home Value $103,098
Average Home Value $138,034
 

HOUSEHOLDS

Total Households 16,962
Average Household Size 2.25
Family Households 9,717
Average Family Size 3
NOTES
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.

GROWTH RATE / YEAR

2010-2018 2018-2023
Population -0.14% -0.23%
Households -0.14% -0.24%
Families -0.31% -0.39%
Median Household Income   2.9%
Per Capita Income   2.72%

Quincy, IL - Peer Comparisons by Rank and Percentile

The table below compares Quincy to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2018 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 45 97th
Population Density # 176 87th
Diversity Index # 440 68th
Median Household Income # 1045 24th
Per Capita Income # 837 39th

Additional comparisons and rankings can be made with a VERY EASY TO USE Illinois Census Data Comparison Tool.

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