Maine

Washington

31,095
2020 population
1790
first census record
24
census records

About Washington

Washington, Maine, first appears in the United States federal census in 1790, when it recorded a population of 2,758. At the most recent census, in 2020, its population stood at 31,095.

Its recorded population peaked at 45,232 in 1900, and has since declined by roughly 31 percent.

On the ground today, 5 documented military engagements have been recorded within the county, among them Battle of Machias (Maine 1775), Battle of Machias, HMS Boxer vs USS Enterprise, and 102 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202031,095
201032,856
200033,941
199035,308
198034,963
197029,859
196032,908
195035,187
194037,767
193037,826
192041,709
191042,905
190045,232
189044,482
188044,484
187043,343
186042,534
185038,811
184028,327
183021,294
182012,744
18107,870
18004,461
17902,758
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, Maine.

Battle of Machias (Maine 1775)
1775
Battle of Machias
1775
HMS Boxer vs USS Enterprise
1813
British Raid on Eastport ME
1814
Raid on Calais Maine (Confederate Plot)
1864

Historic places in Washington

National Register of Historic Places listings in Washington, Maine.

Atkinson-Koskinen Site 45.13
Steuben
Campbell, David W., House
Cherryfield
Governors Point
Grand Lake Stream Plantation
West Quoddy Head Light Station
Lubec
Dennysville Historic District
Dennysville
Ruggles House
Columbia Falls
Lubec Channel Light Station
Lubec
Burnham Tavern
Machias
Jonesboro Union Church
Jonesboro
Archibald-Adams House
Cherryfield
Indian River Baptist Church
Addison
Narraguagus Light Station
Milbridge
Machias Valley Grange, #360 (Former)
Machias
Pike's Mile Markers
Calais
Calais Observatory
Calais
Little River Light Station
Cutler
Mansion House, The
Robbinston
Fort Sullivan
Eastport
West Quoddy Lifesaving Station
Lubec
McGlashan-Nickerson House
Red Beach
Holmes, Dr. Job, House
Calais
Cherryfield Historic District
Cherryfield
Machias Railroad Station
Machias
"The Rim" and Site of Fort Foster
East Machias
Browse all Mainehistoric sites ›

Other counties in Maine

Explore census history and historic records for more Maine counties.

SagadahocSomersetWaldoYorkAndroscogginAroostookCumberlandFranklinHancockKennebecKnoxLincolnOxfordPenobscotPiscataquis
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Everything a full report reveals about Washington County, Maine

This page charts the census history of Washington County, Maine. 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 Maine records

Mainehistory ›NRHP historic sites ›Notable people from Maine›

Frequently asked about Washington

When does Washington first appear in the US census?
Washington, Maine first appears in the federal census in 1790, with a recorded population of 2,758.
What is the population of Washington?
At the most recent federal census (2020), Washington had a recorded population of 31,095.
When did Washington's population peak?
Washington's recorded population peaked at 45,232 in 1900.
Were any battles fought in Washington?
5 documented military engagements took place in Washington, including Battle of Machias (Maine 1775), Battle of Machias, HMS Boxer vs USS Enterprise.
How many historic places are in Washington?
102 sites are listed on the National Register of Historic Places in Washington, Maine.
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