Macomb, IL Profile: Facts, Map & Data


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Macomb, Illinois - Basic Facts

The City of Macomb had a population of 19,838 as of July 1, 2017. Macomb ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Illinois. See peer rankings below.

The primary coordinate point for Macomb is located at latitude 40.4701 and longitude -90.6831 in McDonough County. The formal boundaries for the City of Macomb (see map below) encompass a land area of 10.89 sq. miles and a water area of 0.43 sq. miles. McDonough County is in the Central time zone (GMT -6). The elevation is 709 feet.

The City of Macomb (GNIS ID: 2395801) 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 Macomb is located within Township of Macomb City, a minor civil division (MCD) of McDonough County.

Beneath the boundary map are tables with Macomb population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Alternate Unofficial Names for Macomb: Washington.

Neighborhood Data

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City of Macomb, IL Boundary Map

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Boundary Maps: Township of Macomb City | McDonough County | Illinois Counties

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Macomb, IL Data & Demographics (As of July 1, 2017)


Total Population 19,838
Daytime Population: Workers 11,072
Daytime Population: Residents 13,042
Total Daytime Population (TDP) 24,114
Ratio TDP/Total Population1 1.22
Population in Households 14,959
Population in Familes 7,679
Population in Group Qrtrs 4,879
Population Density2 1,821
Diversity Index3 33


Median Household Income $30,853
Average Household Income $48,985
Per Capita Income $19,247


Total Housing Units 8,160 (100%)
Owner Occupied HU 2,840 (34.8%)
Renter Occupied HU 4,411 (54.1%)
Vacant Housing Units 909 (11.1%)
Median Home Value $100,904
Average Home Value $125,696


Total Households 7,251
Average Household Size 2.06
Family Households 2,760
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 0.37% -0.51%
Households -0.42% -0.74%
Families -0.68% -0.91%
Median Household Income   1.83%
Per Capita Income   2.47%

Macomb, IL - Peer Comparisons by Rank and Percentile

The table below compares Macomb to the other 1,368 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2017 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 # 123 91st
Population Density # 334 76th
Diversity Index # 330 76th
Median Household Income # 1344 2nd
Per Capita Income # 1297 5th

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

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