Townapedia
Jefferson Barracks National Cemetery
Jefferson Barracks National Cemetery · Robert Lawton, CC BY-SA 2.5
Holy Family Log Church Cahokia 063
Holy Family Log Church Cahokia 063 · Kbh3rd, CC BY-SA 3.0
Jefferson Barracks
Jefferson Barracks · John Stanton, CC0
Home Of The Friendless NRHP 15000773 St. Louis City, MO
Home Of The Friendless NRHP 15000773 St. Louis City, MO · Jon Roanhaus, CC BY-SA 3.0
Quinn Chapel at Minnesota and Bowen
Quinn Chapel at Minnesota and Bowen · Paul Sableman, CC BY 2.0
Sugar Loaf Mound at 4420 Ohio in St Louis MO 21
Sugar Loaf Mound at 4420 Ohio in St Louis MO 21 · Parker Botanical, CC BY-SA 3.0

Dupo, Illinois

Dupo is a village of 3,879 people in Monroe County, Illinois, founded in 1750.

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Population3,879 -1.5% since 2019
Elevation410 ft 125 m
Founded1750
Land area6.2 sq mi
ZIP codes62236, 62239, 62240
Nearest airportSaint Louis Downtown - Parks Airport (CPS) 5 mi

Why visit Dupo

Townapedia lists 13 museums and landmarks, 9 parks and trails, 5 places to eat and 2 attractions in and around town.

Highlights include Jefferson Barracks Bridge, Church of the Holy Family, Coca-Cola Syrup Plant and Carondelet Park.

July is the warmest month, with average highs of 88°F; January lows average 22°F.

About Dupo

Dupo is a village in St. Clair County, Illinois, United States. As of the 2020 census, Dupo had a population of 3,996. The village was settled in about 1750 and was incorporated in 1907. Its modern name, adopted in the early 20th century, is shortened from Prairie du Pont ("Bridge Prairie").

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

Things to do2

Jefferson Barracks Bridge

Bridge · 3.8 mi

Mississippi River bridge connecting Monroe County, IL and Southern St. Louis County in MO.

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Oklahoma Hill

Scenic view · 1.6 mi

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Museums and landmarks13

Church of the Holy Family

Monument and historic site · National Register of Historic Places · 4.0 mi

Church building in Illinois, United States of America

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Coca-Cola Syrup Plant

Monument and historic site · National Register of Historic Places · 3.3 mi

Historic factory building in St. Louis

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Jefferson Barracks Military Post

Monument and historic site · National Register of Historic Places · 3.8 mi

Historic military post on the Mississippi River

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Jefferson Barracks National Cemetery

Monument and historic site · National Register of Historic Places · 4.0 mi

Cemetery in St. Louis County, Missouri, USA

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Lunsford-Pulcher Archeological Site

Monument and historic site · National Register of Historic Places · 1.7 mi

Archeological site in Monroe and St. Clair counties in Illinois

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Martin-Boismenue House

Monument and historic site · National Register of Historic Places · 2.4 mi

House in North Dupo, Illinois

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Nicholas Jarrot Mansion

Monument and historic site · National Register of Historic Places · 4.0 mi

House in Illinois, United States of America

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Old Cahokia Courthouse

Monument and historic site · National Register of Historic Places · 4.0 mi

Single-family detached home in Illinois, United States of America

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Sugarloaf Mound

Monument and historic site · National Register of Historic Places · 4.1 mi

Prehistoric monument in St Louis, Missouri

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The Home of the Friendless

Monument and historic site · National Register of Historic Places · 4.2 mi

Historic building in St. Louis, Missouri, United States

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Martin Boismenue Home

Monument and historic site · 2.4 mi

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Martin-Boismenue House State Historic Site

Monument and historic site · 2.4 mi

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1 more on the map.

Parks, trails and playgrounds9

Carondelet Park

Park · 4.1 mi

Park in St. Louis, Missouri

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Dupo Community Garden

Park · 0.4 mi

317 Louisa Street, Dupo

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American Legion Park

Park · 0.6 mi

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Dupo Community Park

Park · 0.8 mi

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Dupo Main Street Historic Park

Park · 0.4 mi

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Dupo Park Splash Pad

Sports field and stadium · 0.7 mi

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George Price Memorial Park

Park · 2.0 mi

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Stoneybrook Park

Park · 2.0 mi

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Sugarloaf Township Park

Park · 0.6 mi

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Restaurants and cafes5

5th Street Billiards

Bar and pub · 0.7 mi

200 North 5th Street, Dupo

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Dairy land

Ice cream · 0.4 mi

501 South Main Street, Dupo

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Dupo American Legion

Bar and pub · 0.6 mi

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Subway

Fast food · Sandwich · 2.3 mi

515 Falling Springs Road, Dupo

09:00-22:00

Open in Google Maps · +1 618-286-9919

Good Times

Fast food · Burger, Ice Cream · 0.5 mi

200 North Main Street, Dupo

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History

In the Mississippian period, Dupo was the site of one of several multi-mound communities in the floodplain near Cahokia. These mounds remained standing at least as recently as 1915.

The French village of Prairie du Pont was first settled around 1750 by townspeople moving out of Cahokia. It was located at a bridge over what is now known as Prairie du Pont Creek, on the trail from Cahokia to Kaskaskia, which was the first wagon road in Illinois. The settlement may have been motivated by Dupo being located 10–12 feet higher than Cahokia and thus being more protected from floods on the Mississippi River. The Sulpician mission established a mill near the bridge, which became the core of the town's development. By 1765 fourteen families lived in Prairie du Pont. The village's growth was further spurred by the prominent local citizen Antoine Girardin, who parceled off parts of the Cahokia commons to residents of Prairie du Pont.

The early French village at Prairie du Pont followed a tripartite system of land ownership that was common in the Illinois country: private houses in a row, "common fields" enclosed by a shared fence but divided into narrow strips owned and farmed by a particular family, and the actual commons used jointly by the inhabitants for grazing their livestock. The village elected a village council, or syndic, to maintain the fence around the common fields.

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

Churches and places of worship6

Schools, colleges and libraries41

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Healthcare1

Map of Dupo

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

Climate by month

20°40°60°80°January: 2.7 in of rainFebruary: 2.3 in of rainMarch: 3.5 in of rainApril: 4.6 in of rainMay: 4.8 in of rainJune: 4.3 in of rainJuly: 5.0 in of rainAugust: 3.1 in of rainSeptember: 3.4 in of rainOctober: 3.0 in of rainNovember: 3.3 in of rainDecember: 2.8 in of rainJanuary: 41°FFebruary: 46°FMarch: 56°FApril: 68°FMay: 76°FJune: 85°FJuly: 88°FAugust: 87°FSeptember: 80°FOctober: 70°FNovember: 56°FDecember: 45°FJanuary: 22°FFebruary: 26°FMarch: 35°FApril: 45°FMay: 56°FJune: 65°FJuly: 69°FAugust: 67°FSeptember: 59°FOctober: 46°FNovember: 35°FDecember: 27°FJFMAMJJASOND
Average high Average low Rain
Monthly table
MonthHighLowRainSnow
Jan41°F22°F2.7 in4.9 in
Feb46°F26°F2.3 in3.7 in
Mar56°F35°F3.5 in1.2 in
Apr68°F45°F4.6 in0.3 in
May76°F56°F4.8 in0.0 in
Jun85°F65°F4.3 in0.0 in
Jul88°F69°F5.0 in0.0 in
Aug87°F67°F3.1 in0.0 in
Sep80°F59°F3.4 in0.0 in
Oct70°F46°F3.0 in0.0 in
Nov56°F35°F3.3 in0.8 in
Dec45°F27°F2.8 in2.9 in

U.S. Climate Normals 1991-2020 for Cahokia (4 mi away), NOAA NCEI.

People and cost of living

$61,644median household income
$113,800median home value
$912median monthly rent
42.9median age
17.8%of adults have a bachelor's degree or higher
65.4%of homes are owner-occupied
25.6 minaverage commute
Age of residents
Under 1820%18 to 3425%35 to 6440%65 and over15%

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

Disaster history

Monroe County has had 9 federal disaster declarations since 2000, most often for severe storms.

  • 2023-08-15: Severe Storms And Flooding (Severe Storm)
  • 2020-03-26: Covid-19 Pandemic (Biological)
  • 2020-03-13: Covid-19 (Biological)
  • 2019-09-19: Severe Storms And Flooding (Flood)
  • 2013-05-10: Severe Storms, Straight-Line Winds, And Flooding (Flood)
  • 2008-06-24: Severe Storms And Flooding (Severe Storm)

OpenFEMA disaster declarations summaries.

Getting there and nearby towns

Saint Louis Downtown - Parks Airport (CPS) is the nearest airport with scheduled flights listed in OpenStreetMap, 5 miles away.

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.