Ohio

Hamilton

830,639
2020 population
1800
first census record
23
census records

About Hamilton

Hamilton, Ohio, first appears in the United States federal census in 1800, when it recorded a population of 14,692. At the most recent census, in 2020, its population stood at 830,639.

Its recorded population peaked at 924,018 in 1970, and has since declined by roughly 10 percent.

On the ground today, 13 documented military engagements have been recorded within the county, among them Turner and Fox Sites (Ohio Hopewell), Fort Ancient vs Shawnee Conflict – Madisonville Site, Madisonville Site Massacre, and 405 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020830,639
2010802,374
2000845,303
1990866,228
1980873,224
1970924,018
1960864,121
1950723,952
1940621,987
1930589,356
1920493,678
1910460,732
1900409,479
1890374,573
1880313,374
1870260,370
1860216,410
1850156,844
184080,145
183052,317
182031,764
181015,258
180014,692
Source

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

Battles & engagements in Hamilton

Military engagements that took place in Hamilton, Ohio.

Turner and Fox Sites (Ohio Hopewell)
200
Fort Ancient vs Shawnee Conflict – Madisonville Site
1400
Madisonville Site Massacre
1400
Raid on Dunlap's Station
1791
Dunlap's Station Attack (Miami Raid)
1791
Attack on Dunlap's Station (1791)
1791
Battle of Dunlap's Station (Feb 1791)
1791
Attack on Dunlap's Station
1791
Battle of Fort Washington Skirmish 1792
1792
Harrison Ohio Skirmish
1863
Morgan's Raid: Harrison Ohio
1863
Morgan's Indiana-Ohio Raid – Harrison, Ohio
1863
Morgan's Raid — Harrison Indiana Skirmish
1863

Historic places in Hamilton

National Register of Historic Places listings in Hamilton, Ohio.

Mills' Row
Cincinnati
Mecklenburg's Garden
Cincinnati
May, David and Mary, House
Cincinnati
St. Francis Hospital
Cincinnati
Harrison, William Henry, Tomb State Memorial
North Bend
Cox, Jacob D., House
Cincinnati
Probasco, Henry, House
Cincinnati
Boulter, Cedric G., and Patricia Neils, House
Cincinnati
Alexandra, The
Cincinati
West Fourth Street Historic District
Cincinnati
Pinecroft
Cincinnati
United Brethren in Christ
Cincinnati
Plum Street Temple
Cincinnati
Luethstrom-Hurin House
Wyoming
Edgecliff Area Historic Group
Cincinnati
Stowe, Harriet Beecher, House (Additional Documentation)
Cincinnati
Mount Airy Forest
Cincinnati
Bennett, George, House
Harrison
Pollock, John C., House
Wyoming
Retszch, W. C., House
Wyoming
Goshorn, Sir Alfred T., House
Cincinnati
Bates Building
Cincinnati
Doctors' Building
Cincinnati
Hemann, Joseph A., House
Cincinnati
Browse all Ohiohistoric sites ›

Other counties in Ohio

Explore census history and historic records for more Ohio counties.

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Everything a full report reveals about Hamilton County, Ohio

This page charts the census history of Hamilton 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 Hamilton

When does Hamilton first appear in the US census?
Hamilton, Ohio first appears in the federal census in 1800, with a recorded population of 14,692.
What is the population of Hamilton?
At the most recent federal census (2020), Hamilton had a recorded population of 830,639.
When did Hamilton's population peak?
Hamilton's recorded population peaked at 924,018 in 1970.
Were any battles fought in Hamilton?
13 documented military engagements took place in Hamilton, including Turner and Fox Sites (Ohio Hopewell), Fort Ancient vs Shawnee Conflict – Madisonville Site, Madisonville Site Massacre.
How many historic places are in Hamilton?
405 sites are listed on the National Register of Historic Places in Hamilton, Ohio.
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