Assumption, IL Profile: Facts, Map & Data


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Assumption, Illinois - Basic Facts

The City of Assumption had a population of 1,061 as of July 1, 2018.

The primary coordinate point for Assumption is located at latitude 39.5178 and longitude -89.0485 in Christian County. The formal boundaries for the City of Assumption (see map below) encompass a land area of 0.88 sq. miles and a water area of 0 sq. miles. Christian County is in the Central time zone (GMT -6). The elevation is 646 feet.

The City of Assumption (GNIS ID: 2394007) 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 Assumption is located within Township of Assumption, a minor civil division (MCD) of Christian County.

Beneath the boundary map are tables with Assumption population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2018.

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City of Assumption, IL Boundary Map

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Boundary Maps: Township of Assumption | Christian County | Illinois Counties

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


Total Population 1,061
Population in Households 1,031
Population in Familes 831
Population in Group Qrtrs 30
Population Density2 1,206
Diversity Index3 10


Median Household Income $40,471
Average Household Income $50,960
Per Capita Income $21,771


Total Housing Units 545 (100%)
Owner Occupied HU 356 (65.3%)
Renter Occupied HU 111 (20.4%)
Vacant Housing Units 78 (14.3%)
Median Home Value $73,023
Average Home Value $77,809


Total Households 467
Average Household Size 2.21
Family Households 300
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  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.


2010-2017 2017-2022
Population -1.16% -1.12%
Households -1.09% -1.09%
Families -0.97% -1.3%
Median Household Income   4.07%
Per Capita Income   3.52%

Assumption, IL - Peer Comparisons by Rank and Percentile

The table below compares Assumption 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 # 687 50th
Population Density # 625 54th
Diversity Index # 838 39th
Median Household Income # 1194 13th
Per Capita Income # 1192 13th

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

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