Illinois · Census place 1770460

Somonauk, Illinois

Somonauk is a village in 2 counties of Illinois with an estimated 1,761 residents on July 1, 2024. It is the 501st largest of 651 incorporated places of 1,000+ people in the state.

Population 2024
1,761
#501 of 651 in Illinois
Change since 2020
-1.2%
-21 people
Land area
2.5 sq mi
Density
704 / sq mi
State median 2,177
Orange pin: Somonauk. Shaded: counties it spans. Dark pin: Springfield.

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Tools and pages that start from Somonauk

Somonauk population, 2020 to 2024

Somonauk lost 21 residents from July 2020 to July 2024, a change of -1.2%. In the latest year it moved by -1.

1,78220201,78220211,77220221,76220231,7612024
July 1 estimates. The April 2020 estimates base was 1,786. The axis starts above zero so yearly changes are visible.

Somonauk covers 2.50 square miles of land, for 704 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Somonauk is less dense than the typical town.

The 2 counties Somonauk spans

Somonauk crosses county lines. The Census county-part estimates split its 1,761 residents as follows; DeKalb County holds 86.9% of them. The shaded shapes are on the map above; dots mark the eight nearest places.

  1. 01DeKalb County1,531
  2. 02LaSalle County230
Residents inside each county, Census Vintage 2024 county-part estimates (SUMLEV 157).

ZIP codes in Somonauk

2 ZIP Code Tabulation Areas (ZCTAs) overlap Somonauk by at least 10% of the ZCTA's or the village's land: 60548, 60552. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a village that annexed land after 2020 may reach into ZIP codes not listed here.

Where Somonauk is

The Census internal point of Somonauk is at 41.634700, -88.687500. Springfield, the capital, is 137.6 miles SSW in a straight line. The nearest larger place is Sandwich, IL (7,299 people), 3.7 miles away. The nearest city of 100,000 or more is Aurora, IL, 22.4 miles away.

Internal point

Decimal
41.634700, -88.687500
DMS
41°38'4.92"N 88°41'15.00"W
UTM
16N 359446.4E 4610594.0N
Geohash
dp2uvg7ex
Plus code
86HHJ8M7+V2

Daylight in Somonauk

At 41.63° N, Somonauk gets about 15 h 12 min of daylight around the June solstice and 9 h 09 min around the December solstice, a swing of 6 h 03 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Somonauk

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Sandwich, 3.7 miles away, with 7,299 people.

Questions people ask

What is the population of Somonauk, IL?

1,761 on July 1, 2024, in the Census Vintage 2024 estimates. That is down 21 (1.2%) from 1,782 in July 2020.

What county is Somonauk in?

It spans 2 counties: DeKalb County (1,531 residents), LaSalle County (230 residents).

What ZIP codes cover Somonauk?

2 ZIP Code Tabulation Areas overlap it by at least 10% of either area: 60548, 60552.

How far is Somonauk from Springfield?

137.6 miles (221.5 km) in a straight line, heading SSW from Somonauk.

What is the nearest larger city to Somonauk?

Sandwich, IL, with 7,299 residents, 3.7 miles away between internal points.

Sources and data as of

Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.

  1. 01Census Vintage 2024 subcounty population estimates
  2. 02Census 2024 Gazetteer, places
  3. 03Census 2020 ZCTA to place relationship file
  4. 04Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.