Iowa

Henry

20,482
2020 population
1840
first census record
19
census records

About Henry

Henry, Iowa, first appears in the United States federal census in 1840, when it recorded a population of 3,772. At the most recent census, in 2020, its population stood at 20,482.

Its recorded population peaked at 21,463 in 1870, and has since declined by roughly 5 percent.

On the ground today, 53 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202020,482
201020,145
200020,336
199019,226
198018,890
197018,114
196018,187
195018,708
194017,994
193017,660
192018,298
191018,640
190020,022
189018,895
188020,986
187021,463
186018,701
18508,707
18403,772
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Historic places in Henry

National Register of Historic Places listings in Henry, Iowa.

Zuhn Building
Mount Pleasant
Peterson Manufacturing Building
New London
McClellan's General Store
New London
Geode State Park, Civilian Conservation Corps Area
Danville
Ambler, Henry, House
Mt. Pleasant
Hultquist, John, House
Swedesburg
Lamm-Pollmiller Farmstead District
Salem
Hult, Charles E., House, Summer Kitchen and Wood Shed
Swedesburg
Swedesburg Historic Commercial District
Swedesburg
Fish Creek Bridge
Salem
Farmers Savings Bank
Salem
Oakland Mills Bridge
Oakland Mills State Park
Red Ball Garage
Swedesburg
Budde-Singer Building
Mount Pleasant
Louisa Building
Mount Pleasant
Henry County Savings Bank
Mount Pleasant
Benjamin Chapel and Richwoods Cemetery
Trenton
Union Block
Mount Pleasant
Wilson, Paton and Hannah, House
Salem
Bicksler Block
Salem
Cooper, George and Margaret, House
Mount Pleasant
Bangs, John and Lavina, House
New London
Old Main
Mount Pleasant
Swedish Evangelical Lutheran Church
Swedesburg
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Explore census history and historic records for more Iowa counties.

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Everything a full report reveals about Henry County, Iowa

This page charts the census history of Henry County, Iowa. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Henry

When does Henry first appear in the US census?
Henry, Iowa first appears in the federal census in 1840, with a recorded population of 3,772.
What is the population of Henry?
At the most recent federal census (2020), Henry had a recorded population of 20,482.
When did Henry's population peak?
Henry's recorded population peaked at 21,463 in 1870.
How many historic places are in Henry?
53 sites are listed on the National Register of Historic Places in Henry, Iowa.
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