Somonauk, IL Profile: Facts & Data


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Somonauk, Illinois - Basic Facts

The Village of Somonauk had a population of 1,918 as of July 1, 2018.

The primary coordinate point for Somonauk is located at latitude 41.6336 and longitude -88.6812 in DeKalb County. The formal boundaries for the Village of Somonauk encompass a land area of 2.41 sq. miles and a water area of 0 sq. miles. DeKalb County is in the Central time zone (GMT -6). The elevation is 686 feet.

While the primary coordinates for Village of Somonauk are located in DeKalb County, it should be noted that the formal boundaries for this community also extend into and LaSalle County.

The Village of Somonauk (GNIS ID: 2399838) 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 Village of Somonauk is located within Township of Somonauk, a minor civil division (MCD) of DeKalb County.

Jump to... (On This Page!)
  1. Somonauk 2018 Demographic Data
  2. Growth Rates for Somonauk (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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Somonauk, IL Data & Demographics (As of July 1, 2018)


Total Population 1,918
Population in Households 1,918
Population in Familes 1,662
Population in Group Qrtrs 0
Population Density2 794
Diversity Index3 18


Median Household Income $68,382
Average Household Income $81,704
Per Capita Income $30,444


Total Housing Units 798 (100%)
Owner Occupied HU 532 (66.7%)
Renter Occupied HU 204 (25.6%)
Vacant Housing Units 63 ( 7.9%)
Median Home Value $179,762
Average Home Value $203,430


Total Households 735
Average Household Size 2.61
Family Households 543
Average Family Size 3
  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.


2010-2018 2018-2023
Population 0.16% 0.18%
Households 0.3% 0.32%
Families 0.69% 0.18%
Median Household Income   2.25%
Per Capita Income   2.65%

Somonauk, IL - Peer Comparisons by Rank and Percentile

The table below compares Somonauk 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 # 520 62nd
Population Density # 884 35th
Diversity Index # 516 62nd
Median Household Income # 307 78th
Per Capita Income # 474 65th

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

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