Ohio

Washington

59,771
2020 population
1800
first census record
23
census records

About Washington

Washington, Ohio, first appears in the United States federal census in 1800, when it recorded a population of 5,427. At the most recent census, in 2020, its population stood at 59,771.

Its recorded population peaked at 64,266 in 1980, and has since declined by roughly 7 percent.

On the ground today, one documented military engagement has been recorded within the county, among them Raid on Big Bottom Settlement, and 39 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202059,771
201061,778
200063,251
199062,254
198064,266
197057,160
196051,689
195044,407
194043,537
193042,437
192043,049
191045,422
190048,245
189042,380
188043,244
187040,609
186036,268
185029,540
184020,823
183011,731
182010,425
18105,991
18005,427
Source

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

Battles & engagements in Washington

Military engagements that took place in Washington, Ohio.

Raid on Big Bottom Settlement
1791

Historic places in Washington

National Register of Historic Places listings in Washington, Ohio.

Ohio Company Land Office
Marietta
Putnam, Rufus, House
Marietta
Deming, Col. Simeon, House
Watertown
Hune Covered Bridge
Dart
Harmar Historic District
Marietta
MISSISSIPPI III
Marietta
Root Covered Bridge
Decaturville
Hildreth Covered Bridge
Marietta
Shinn Covered Bridge
Bartlett
Sprague, Jonathan, House
Lowell
Watertown Historic District
Watertown
Harra Covered Bridge
Watertown
Rinard Covered Bridge
Marietta
Coal Run Historic District
Coal Run
Bell Covered Bridge
Vincent
Barker, Col. Joseph, House
Marietta
First Unitarian Church Of Marietta
Marietta
Stone, Capt. Jonathan, House
Belpre
Ames, Charles Rice, House
Belpre
Waernicke-Hille House And Store
Archer's Fork
Mason House
Coal Run
Barker, Judge Joseph, Jr., House
Newport
Marietta Historic District (Boundary Increase)
Marietta
Marietta Historic District
Marietta
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 Washington County, Ohio

This page charts the census history of Washington 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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Ohiohistory ›NRHP historic sites ›Notable people from Ohio›

Frequently asked about Washington

When does Washington first appear in the US census?
Washington, Ohio first appears in the federal census in 1800, with a recorded population of 5,427.
What is the population of Washington?
At the most recent federal census (2020), Washington had a recorded population of 59,771.
When did Washington's population peak?
Washington's recorded population peaked at 64,266 in 1980.
Were any battles fought in Washington?
1 documented military engagement took place in Washington, including Raid on Big Bottom Settlement.
How many historic places are in Washington?
39 sites are listed on the National Register of Historic Places in Washington, Ohio.
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