Somonauk, IL Profile: Facts, Map & Data


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Somonauk, Illinois - Basic Facts

The Village of Somonauk had a population of 1,913 as of July 1, 2015.

The primary coordinate point for Somonauk is located at latitude 41.6347 and longitude -88.6875 in DeKalb County. The formal boundaries for the Village of Somonauk (see map below) 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.

Beneath the boundary map are tables with Somonauk population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.

Neighborhood Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


Village of Somonauk, IL Boundary Map

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Boundary Maps: Township of Somonauk | DeKalb County | Illinois Counties

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Somonauk, IL Data & Demographics (As of July 1, 2015)


Total Population 1,913
Population in Households 1,913
Population in Familes 1,649
Population in Group Qrtrs 0
Population Density1 792
Diversity Index2 17


Total Households 730
Average Household Size 2.62
Family Households 539
Average Family Size 3


Total Housing Units 782 (100%)
Owner Occupied HU 537 (68.7%)
Renter Occupied HU 192 (24.6%)
Vacant Housing Units 52 ( 6.6%)
Median Home Value $154,330
Average Home Value $167,764


Median Household Income $61,733
Average Household Income $73,124
Per Capita Income $27,089
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.2% -0.02%
Households 0.34% 0.08%
Families 0.95% -0.11%
Median Household Income   3.55%
Per Capita Income   2.64%
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.


Somonauk, IL - Peer Comparisons by Rank and Percentile

The table below compares Somonauk to the other 1,367 incorporated cities, towns and CDPs in Illinois by rank and percentile using July 1, 2015 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 Density1 # 900 34th
Diversity Index2 # 516 62nd
Median Household Income # 379 72nd
Per Capita Income # 501 63rd

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