Indiana

Union

7,087
2020 population
1830
first census record
20
census records

About Union

Union, Indiana, first appears in the United States federal census in 1830, when it recorded a population of 7,944. At the most recent census, in 2020, its population stood at 7,087.

Its recorded population peaked at 8,017 in 1840, and has since declined by roughly 12 percent.

On the ground today, one documented military engagement has been recorded within the county, among them Morgan's Raid: Hamilton Indiana, and 3 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
20207,087
20107,516
20007,349
19906,976
19806,860
19706,582
19606,457
19506,412
19406,017
19305,880
19206,021
19106,260
19006,748
18907,006
18807,673
18706,341
18607,109
18506,944
18408,017
18307,944
Source

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

Battles & engagements in Union

Military engagements that took place in Union, Indiana.

Morgan's Raid: Hamilton Indiana
1863

Historic places in Union

National Register of Historic Places listings in Union, Indiana.

Union County Courthouse
Liberty
Liberty Residential Historic District
Liberty
Liberty Courthouse Square Historic District
Liberty

Other counties in Indiana

Explore census history and historic records for more Indiana counties.

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Everything a full report reveals about Union County, Indiana

This page charts the census history of Union County, Indiana. 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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Explore Indiana records

Indianahistory ›NRHP historic sites ›Notable people from Indiana›

Frequently asked about Union

When does Union first appear in the US census?
Union, Indiana first appears in the federal census in 1830, with a recorded population of 7,944.
What is the population of Union?
At the most recent federal census (2020), Union had a recorded population of 7,087.
When did Union's population peak?
Union's recorded population peaked at 8,017 in 1840.
Were any battles fought in Union?
1 documented military engagement took place in Union, including Morgan's Raid: Hamilton Indiana.
How many historic places are in Union?
3 sites are listed on the National Register of Historic Places in Union, Indiana.
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