Arkansas

Union

39,054
2020 population
1830
first census record
20
census records

About Union

Union, Arkansas, first appears in the United States federal census in 1830, when it recorded a population of 640. At the most recent census, in 2020, its population stood at 39,054.

Its recorded population peaked at 55,800 in 1930, and has since declined by roughly 30 percent.

On the ground today, 38 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202039,054
201041,639
200045,629
199046,719
198048,573
197045,428
196049,518
195049,686
194050,461
193055,800
192029,691
191030,723
190022,495
189014,977
188013,419
187010,571
186012,288
185010,298
18402,889
1830640
Source

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

Historic places in Union

National Register of Historic Places listings in Union, Arkansas.

Rainey, Matthew, House
El Dorado
McKinney, Henry Crawford, House
El Dorado
Smackover Historic Commercial District
Smackover
Henley-Riley Houses
El Dorado
Scotland Cemetery
Junction City
Dual State Monument
Aurelle
Willett House
Lisbon
Murphy-Hill Historic District
El Dorado
Oakland
El Dorado
Rialto Theatre
El Dorado
Mount Moriah Masonic Lodge No. 18
Lisbon
James, Randolph, House
El Dorado
Griffin Auto Company Building
El Dorado
McWilliams, J.H., House
El Dorado
Smith, Joel, House
El Dorado
El Dorado Junior College Building
El Dorado
El Dorado Commercial Historic District (Additional Documentation)
El Dorado
First Presbyterian Church
El Dorado
El Dorado Confederate Monument
El Dorado
Mahony Historic District
El Dorado
McDonald, D., House
Smackover
Goodwin Field Administration Building
El Dorado
Masonic Temple
El Dorado
Murphy, J.T., No 1 Crater
Norphlet
Browse all Arkansashistoric sites ›

Other counties in Arkansas

Explore census history and historic records for more Arkansas counties.

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Everything a full report reveals about Union County, Arkansas

This page charts the census history of Union County, Arkansas. 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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Arkansashistory ›NRHP historic sites ›Military engagements ›Notable people from Arkansas›

Frequently asked about Union

When does Union first appear in the US census?
Union, Arkansas first appears in the federal census in 1830, with a recorded population of 640.
What is the population of Union?
At the most recent federal census (2020), Union had a recorded population of 39,054.
When did Union's population peak?
Union's recorded population peaked at 55,800 in 1930.
How many historic places are in Union?
38 sites are listed on the National Register of Historic Places in Union, Arkansas.
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