Colchester, IL Profile: Facts, Map & Data


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Colchester, Illinois - Basic Facts

The City of Colchester is an incorporated place (Class Code P1) located in McDonough County at latitude 40.4273 and longitude -90.7921. McDonough County is in the Central time zone (GMT -6). The elevation is 696 feet.

The formal official name is the City of Colchester, but most people and references simply refer to it as Colchester, Illinois.

The P1 Census Class Code for Colchester indicates a populated place that is also an incorporated place with the same name and the same census code. The Incorporated Place has a Functional Status Code "A" which identifies an active government providing primary general-purpose functions.

The formal boundaries for the City of Colchester (see map below) encompass a land area of 1 sq. miles and a water area of 0 sq. miles.

Alternate Unofficial Names for Colchester: Chester.

City of Colchester, IL Boundary Map


Also See: BIG Map | Driving Directions | IL Congressional Districts
Boundary Maps: Township of Colchester | McDonough County | Illinois Counties

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Colchester, IL Data & Demographics (As of July 1, 2014)


Total Population 1,391
Population in Households 1,391
Population in Familes 1,054
Population in Group Qrtrs 0
Population Density1 1,394
Diversity Index2 5


Total Households 609
Average Household Size 2.28
Family Households 385
Average Family Size 3


Total Housing Units 678 (100%)
Owner Occupied HU 440 (64.9%)
Renter Occupied HU 169 (24.9%)
Vacant Housing Units 69 (10.2%)
Median Home Value $63,990
Average Home Value $71,591


Median Household Income $38,542
Average Household Income $44,494
Per Capita Income $19,615
  (Compound Annual Growth Rates)


2010-2014 2014-2019
Population -0.17% -0.06%
Households 0.04% 0.03%
Families -0.12% -0.16%
Median Household Income   1.68%
Per Capita Income   1.69%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


Colchester, IL - Peer Comparisons by Rank and Percentile

The table below compares Colchester to the other 1,367 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2014 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 # 607 56th
Population Density1 # 535 61st
Diversity Index2 # 1229 10th
Median Household Income # 1194 13th
Per Capita Income # 1189 13th

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