Townapedia
Marengo Public Library
Marengo Public Library · RickH86, Public domain
Iowa County Courthouse, Marengo
Iowa County Courthouse, Marengo · cwwycoff1, CC BY 2.0

Marengo, Iowa

Marengo is a city of 2,725 people in Iowa County, Iowa, founded in 1845.

Loading the weather...
Population2,725 +9.7% since 2019
Elevation738 ft 225 m
Founded1845
Land area2.1 sq mi
ZIP code52301
Nearest airportEastern Iowa Airport (CID) 19 mi

Why visit Marengo

Townapedia lists 2 museums and landmarks and 4 parks and trails in and around town.

Highlights include Iowa County Courthouse and Iowa County Historical Society.

July is the warmest month, with average highs of 84°F; January lows average 10°F, and about 28 inches of snow fall in a normal year.

About Marengo

Marengo is a city in and the county seat of Iowa County, Iowa, United States. It has served as the county seat since August 1845, even though it was not incorporated until July 1859. The population was 2,435 in the 2020 census, a decline from 2,535 in 2000.

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

Museums and landmarks2

Iowa County Courthouse

Monument and historic site · National Register of Historic Places

Courthouse in Iowa, United States

Open in Google Maps · Wikipedia

Iowa County Historical Society

Museum

675 East South Street, Marengo

Open in Google Maps · +1-319-642-7018

Parks, trails and playgrounds4

Simmons Timber Reserve

Hiking and trails · 1.3 mi

Open in Google Maps

Gateway Park

Park · 0.8 mi

Open in Google Maps

Iowa River Corridor Wildlife Management Area

Hiking and trails · 1.5 mi

Open in Google Maps

Lion's Club Park

Park · 0.6 mi

Open in Google Maps

Churches and places of worship6

Kingdom Hall of Jehovahs Witnesses

Church · Jehovahs Witness

Open in Google Maps

Methodist Church

Church · Methodist

Open in Google Maps

Presbyterian Church

Church · Presbyterian

Open in Google Maps

Saint Johns Lutheran Church

Church · Lutheran

Open in Google Maps

Church of the Nazarene

Church

Open in Google Maps

Saint Patricks Church

Church · 0.4 mi

Open in Google Maps

Advertisement

Shopping1

Big G

Grocery · 0.4 mi

Open in Google Maps

History

Marengo was laid out in 1845 and platted in 1847. The city's name commemorates the Battle of Marengo, where Napoleon defeated the Austrian army.

The Iowa County Courthouse, built in 1893, is on the National Register of Historic Places.

In 1859, abolitionist John Brown led a group of escaped slaves from Missouri to Michigan. On February 20, the group stayed at the Draper B. Reynolds Farm 1.5 miles south of Marengo.

An explosion at the C6-Zero alternative fuel production plant resulted in a fire and multiple injuries December 2022, prompting the city to urge residents to evacuate and avoid the area until the toxic smoke cleared.

From the History section of Marengo, Iowa on Wikipedia, under CC BY-SA 4.0.

Gas and EV charging2

Schools, colleges and libraries5

Advertisement

Healthcare1

Map of Marengo

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

Climate by month

20°40°60°80°January: 1.2 in of rainFebruary: 1.5 in of rainMarch: 2.2 in of rainApril: 3.9 in of rainMay: 4.8 in of rainJune: 4.8 in of rainJuly: 4.3 in of rainAugust: 4.5 in of rainSeptember: 3.8 in of rainOctober: 2.8 in of rainNovember: 2.2 in of rainDecember: 1.7 in of rainJanuary: 28°FFebruary: 33°FMarch: 46°FApril: 60°FMay: 71°FJune: 80°FJuly: 84°FAugust: 82°FSeptember: 76°FOctober: 63°FNovember: 47°FDecember: 34°FJanuary: 10°FFebruary: 14°FMarch: 26°FApril: 36°FMay: 49°FJune: 59°FJuly: 63°FAugust: 60°FSeptember: 51°FOctober: 39°FNovember: 27°FDecember: 16°FJFMAMJJASOND
Average high Average low Rain
Monthly table
MonthHighLowRainSnow
Jan28°F10°F1.2 in7.6 in
Feb33°F14°F1.5 in7.7 in
Mar46°F26°F2.2 in3.6 in
Apr60°F36°F3.9 in0.9 in
May71°F49°F4.8 in0.1 in
Jun80°F59°F4.8 in0.0 in
Jul84°F63°F4.3 in0.0 in
Aug82°F60°F4.5 in0.0 in
Sep76°F51°F3.8 in0.0 in
Oct63°F39°F2.8 in0.3 in
Nov47°F27°F2.2 in1.6 in
Dec34°F16°F1.7 in6.3 in

U.S. Climate Normals 1991-2020 for Williamsburg 1E (10 mi away), NOAA NCEI.

People and cost of living

$57,941median household income
$123,200median home value
$700median monthly rent
39.6median age
12.9%of adults have a bachelor's degree or higher
69.2%of homes are owner-occupied
20.2 minaverage commute
Age of residents
Under 1823%18 to 3420%35 to 6436%65 and over21%

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

Disaster history

Iowa County has had 15 federal disaster declarations since 2000, most often for severe storms.

  • 2024-05-24: Severe Storms, Tornadoes, And Flooding (Severe Storm)
  • 2020-08-17: Severe Storms (Severe Storm)
  • 2020-03-23: Covid-19 Pandemic (Biological)
  • 2020-03-13: Covid-19 (Biological)
  • 2019-03-23: Severe Storms And Flooding (Flood)
  • 2014-08-05: Severe Storms, Tornadoes, Straight-Line Winds, And Flooding (Severe Storm)

OpenFEMA disaster declarations summaries.

Getting there and nearby towns

Eastern Iowa Airport (CID) is the nearest airport with scheduled flights listed in OpenStreetMap, 19 miles away.

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

Reviews, tips and questions

Loading what members have shared...

Sources and licences

Photo credits

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