Townapedia
20061021 01 BNSF Somonauk, IL (16007687604)
20061021 01 BNSF Somonauk, IL (16007687604) · David Wilson from Oak Park, Illinois, USA, CC BY 2.0
20081011 15 BNSF Somonauk, Illinois (38561457505)
20081011 15 BNSF Somonauk, Illinois (38561457505) · David Wilson from Oak Park, Illinois, USA, CC BY 2.0
20081011 13 Scopin' out the right-of-way, Somonauk, Illinois (27662681949)
20081011 13 Scopin' out the right-of-way, Somonauk, Illinois (27662681949) · David Wilson from Oak Park, Illinois, USA, CC BY 2.0
Von KleinSmid Mansion1
Von KleinSmid Mansion1 · A. McMurray A mcmurray, CC BY 2.5
Sandwich City Hall5
Sandwich City Hall5 · A. McMurray A mcmurray, CC BY 2.5
19960720 06 BNSF near Sandwich, IL (5554650684)
19960720 06 BNSF near Sandwich, IL (5554650684) · David Wilson from Oak Park, Illinois, USA, CC BY 2.0

Somonauk, Illinois

Somonauk is a village of 1,569 people in DeKalb County, Illinois.

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Population1,569 -26.2% since 2019
Elevation686 ft 209 m
Land area2.5 sq mi
ZIP codes60548, 60552
Nearest airportAurora Municipal Airport (AUZ) 15 mi

Why visit Somonauk

Townapedia lists 3 museums and landmarks and 4 parks and trails in and around town.

Highlights include Von KleinSmid Mansion, Sandwich City Hall, Finding Heroes Park and Somonauk Community Park.

July is the warmest month, with average highs of 84°F; January lows average 15°F.

About Somonauk

Somonauk is a village in DeKalb and LaSalle Counties in the U.S. state of Illinois. The population was 1,786 at the 2020 Census, down from 1,893 at the 2010 Census.

From the Wikipedia article Somonauk, Illinois (this version), under CC BY-SA 4.0.

Museums and landmarks3

Von KleinSmid Mansion

Monument and historic site · National Register of Historic Places · 3.6 mi

Building in Illinois, United States

Open in Google Maps · Wikipedia

Sandwich City Hall

Cinema and theater · National Register of Historic Places · 3.6 mi

Open in Google Maps · Wikipedia

The Northern Boundary

Monument and historic site · 1.7 mi

Open in Google Maps

Parks, trails and playgrounds4

Finding Heroes Park

Park

310 Warren Street, Somonauk

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Somonauk Community Park

Park · 0.4 mi

470 South Depot Street, Somonauk

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Children's Park

Park

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Sannauk Forest Preserve

Hiking and trails · 1.7 mi

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Churches and places of worship2

Union Congregational Church

Church · Congregational · 0.4 mi

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Somonauk Baptist Church

Church · 0.5 mi

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Schools, colleges and libraries15

Somonauk Public Library District

Library · 0.8 mi

700 East Lasalle Street, Somonauk

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Herman E Dummer

School · 3.5 mi

422 S Wells St, Sandwich

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Indian Valley Area Voc Ctr

School · 3.8 mi

600 Lions Rd, Sandwich

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James R Wood Elem School

School

320 S Maple St, Somonauk

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Leland Elem School

School · 5.9 mi

370 N Main St, Leland

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Leland High School

School · 5.9 mi

370 N Main St, Leland

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Lynn G Haskin Elementary School

School · 3.5 mi

720 S Wells St, Sandwich

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Prairie View Elem School

School · 3.4 mi

1201 Castle St, Sandwich

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Sandwich Community High School

School · 3.8 mi

515 Lions Rd, Sandwich

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Sandwich Middle School

School · 3.5 mi

600 S Wells St, Sandwich

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Somonauk High School

School

501 W Market St, Somonauk

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Somonauk Middle School

School

510 W Lasalle St, Somonauk

Open in Google Maps

3 more on the map.

History

The name "Somonauk" is of Pottawatomie origin. The name is most likely derived from the phonetic phrase As-sim-in-eh-kon, which translates to "pawpaw grove", in reference to the vast groves of pawpaw trees that filled the area at that time.

The Second Treaty of Prairie du Chien, signed by General John McNeil Jr., Colonel Pierre Menard, and Caleb Atwater for the United States on June 29, 1829, references four sections of land being reserved for Chief Awn-kote and his band of 171 villagers "at the village of Saw-meh-naug along the Fox and Illinois Rivers". The Saw-meh-naug, along with the other Pottawatomie of the Illinois River (known as the Prairie Group), as well as the Sauk and the Chippewa, had aided the U.S. in the Black Hawk War. After the war, as a thanks to the Pottawatomie, the U.S. Government signed a treaty allowing the Prairie Group tribes to continue to hunt on U.S. land, outside of their allocated reservations. However, due to "rumors of the Pottawatomie being restless and committing depredations in the northern part of the state spreading to central Illinois", and white residents of the state feeling uncomfortable, the Governor "gave the Prairie Group an ultimatum to leave Illinois". By the end of December 1833, the Pottawatomie had left Illinois, and the settlements of the Pottawatomie were free to be claimed by white settlers.

From the History section of Somonauk, Illinois on Wikipedia, under CC BY-SA 4.0.

Map of Somonauk

24 places. The map loads OpenStreetMap tiles when you open it.

Climate by month

20°40°60°80°January: 1.3 in of rainFebruary: 1.4 in of rainMarch: 2.2 in of rainApril: 3.6 in of rainMay: 4.1 in of rainJune: 4.0 in of rainJuly: 3.7 in of rainAugust: 3.4 in of rainSeptember: 3.0 in of rainOctober: 3.2 in of rainNovember: 2.3 in of rainDecember: 1.7 in of rainJanuary: 30°FFebruary: 35°FMarch: 48°FApril: 60°FMay: 72°FJune: 81°FJuly: 84°FAugust: 82°FSeptember: 76°FOctober: 63°FNovember: 48°FDecember: 36°FJanuary: 15°FFebruary: 18°FMarch: 28°FApril: 37°FMay: 49°FJune: 58°FJuly: 62°FAugust: 60°FSeptember: 52°FOctober: 41°FNovember: 29°FDecember: 21°FJFMAMJJASOND
Average high Average low Rain
Monthly table
MonthHighLowRain
Jan30°F15°F1.3 in
Feb35°F18°F1.4 in
Mar48°F28°F2.2 in
Apr60°F37°F3.6 in
May72°F49°F4.1 in
Jun81°F58°F4.0 in
Jul84°F62°F3.7 in
Aug82°F60°F3.4 in
Sep76°F52°F3.0 in
Oct63°F41°F3.2 in
Nov48°F29°F2.3 in
Dec36°F21°F1.7 in

U.S. Climate Normals 1991-2020 for Chicago Aurora Muni Ap (14 mi away), NOAA NCEI.

People and cost of living

$84,583median household income
$234,400median home value
$993median monthly rent
45.6median age
22.7%of adults have a bachelor's degree or higher
73.9%of homes are owner-occupied
27.8 minaverage commute
Age of residents
Under 1820%18 to 3418%35 to 6436%65 and over26%

American Community Survey 5-year estimates, 2020-2024, U.S. Census Bureau. Estimates have margins of error, larger for small towns.

Disaster history

DeKalb County has had 8 federal disaster declarations since 2000, most often for biologicals.

  • 2020-03-26: Covid-19 Pandemic (Biological)
  • 2020-03-13: Covid-19 (Biological)
  • 2013-05-10: Severe Storms, Straight-Line Winds, And Flooding (Flood)
  • 2011-03-17: Severe Winter Storm And Snowstorm (Snowstorm)
  • 2008-10-03: Severe Storms And Flooding (Severe Storm)
  • 2007-09-25: Severe Storms And Flooding (Severe Storm)

OpenFEMA disaster declarations summaries.

Getting there and nearby towns

Aurora Municipal Airport (AUZ) is the nearest airport with scheduled flights listed in OpenStreetMap, 15 miles away.

  • Lake Holiday 2 mi southeast, about 2 min by car
  • Sandwich 4 mi east, about 6 min by car
  • Leland 6 mi west, about 9 min by car
  • Sheridan 7 mi south, about 12 min by car
  • Plano 9 mi east, about 14 min by car
  • Newark 9 mi southeast, about 14 min by car
  • Hinckley 10 mi north, about 16 min by car
  • Big Rock 12 mi northeast, about 20 min by car
  • Yorkville 13 mi east, about 22 min by car
  • Earlville 13 mi west, about 20 min by car

Drive times are estimates from straight-line distance, not routes.

Reviews, tips and questions

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Sources and licences

Photo credits

Page built October 30, 2026. Spotted a mistake? Tell us or suggest a place.