Ohio

Marion

65,359
2020 population
1830
first census record
20
census records

About Marion

Marion, Ohio, first appears in the United States federal census in 1830, when it recorded a population of 6,551. At the most recent census, in 2020, its population stood at 65,359.

Its recorded population peaked at 67,974 in 1980, and has since declined by roughly 4 percent.

On the ground today, 6 documented military engagements have been recorded within the county, among them Battle of the Sandusky — Crawford's Defeat, Crawford's Defeat (Sandusky Campaign), Crawford's Defeat (Sandusky Expedition), and 20 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202065,359
201066,501
200066,217
199064,274
198067,974
197064,724
196060,221
195049,959
194044,898
193045,420
192042,004
191033,971
190028,678
189024,727
188020,565
187016,184
186015,490
185012,618
184014,765
18306,551
Source

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

Battles & engagements in Marion

Military engagements that took place in Marion, Ohio.

Battle of the Sandusky — Crawford's Defeat
1782
Crawford's Defeat (Sandusky Campaign)
1782
Crawford's Defeat (Sandusky Expedition)
1782
Crawford's Defeat 1782
1782
Crawford Expedition
1782
Crawford Expedition – Sandusky Defeat
1782

Historic places in Marion

National Register of Historic Places listings in Marion, Ohio.

Marion County Courthouse
Marion
Harding Tomb
Marion
Palace Theater
Marion
Marion Catholic School
Marion
Caledonia Bowstring Bridge
Caledonia
Marion Cemetery Receiving Vault
Marion
Harding, Warren G., House
Marion
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Other counties in Ohio

Explore census history and historic records for more Ohio counties.

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Everything a full report reveals about Marion County, Ohio

This page charts the census history of Marion County, Ohio. 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 Marion

When does Marion first appear in the US census?
Marion, Ohio first appears in the federal census in 1830, with a recorded population of 6,551.
What is the population of Marion?
At the most recent federal census (2020), Marion had a recorded population of 65,359.
When did Marion's population peak?
Marion's recorded population peaked at 67,974 in 1980.
Were any battles fought in Marion?
6 documented military engagements took place in Marion, including Battle of the Sandusky — Crawford's Defeat, Crawford's Defeat (Sandusky Campaign), Crawford's Defeat (Sandusky Expedition).
How many historic places are in Marion?
20 sites are listed on the National Register of Historic Places in Marion, Ohio.
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