Maine

Waldo

39,607
2020 population
1830
first census record
20
census records

About Waldo

Waldo, Maine, first appears in the United States federal census in 1830, when it recorded a population of 29,788. At the most recent census, in 2020, its population stood at 39,607.

Its recorded population peaked at 47,230 in 1850, and has since declined by roughly 16 percent.

On the ground today, one documented military engagement has been recorded within the county, among them Battle of Penobscot Expedition, and 69 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202039,607
201038,786
200036,280
199033,018
198028,414
197023,328
196022,632
195021,687
194021,159
193020,286
192021,328
191023,383
190024,185
189027,759
188032,463
187034,522
186038,447
185047,230
184041,509
183029,788
Source

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

Battles & engagements in Waldo

Military engagements that took place in Waldo, Maine.

Battle of Penobscot Expedition
1779

Historic places in Waldo

National Register of Historic Places listings in Waldo, Maine.

Bayside Historic District
Bayside
Belfast Historic District (Additional Documentation)
Belfast
Fort Knox State Park
Prospect
Philler Cottage
Islesboro
Hardscrabble Farm
Searsmont
Winterport Historic District
Winterport
Tiffany, George S., Cottage
Dark Harbor
Hichborn, Nathan G., House
Stockton Springs
Islesboro Free Library
Islesboro
Free Will Baptist Church and Cemetery
North Islesboro
Grindle Point Light Station
Islesboro
Greer's Corner School
Belmont Corner
Fort Pownall Memorial
Stockton Springs
East Main Street Historic District
Searsport
Christ Church
Dark Harbor
Mortland Family Farm
Searsport
Belfast Commercial Historic District
Belfast
Carver Memorial Library
Searsport
Union School
Searsport
Belfast Historic District (Boundary Increase)
Belfast
Pendleton, James G., House
Searsport
Belfast Historic District (Boundary Increase)
Belfast
Fort Point Light Station
Stockton Springs
Old Post Office
Liberty
Browse all Mainehistoric sites ›

Other counties in Maine

Explore census history and historic records for more Maine counties.

PiscataquisSagadahocSomersetWashingtonYorkAndroscogginAroostookCumberlandFranklinHancockKennebecKnoxLincolnOxfordPenobscot
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Everything a full report reveals about Waldo County, Maine

This page charts the census history of Waldo 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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Frequently asked about Waldo

When does Waldo first appear in the US census?
Waldo, Maine first appears in the federal census in 1830, with a recorded population of 29,788.
What is the population of Waldo?
At the most recent federal census (2020), Waldo had a recorded population of 39,607.
When did Waldo's population peak?
Waldo's recorded population peaked at 47,230 in 1850.
Were any battles fought in Waldo?
1 documented military engagement took place in Waldo, including Battle of Penobscot Expedition.
How many historic places are in Waldo?
69 sites are listed on the National Register of Historic Places in Waldo, Maine.
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