Michigan

Washtenaw

372,258
2020 population
1830
first census record
20
census records

About Washtenaw

Washtenaw, Michigan, first appears in the United States federal census in 1830, when it recorded a population of 4,042. At the most recent census, in 2020, its population stood at 372,258.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, 83 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020372,258
2010344,791
2000322,895
1990282,937
1980264,748
1970234,103
1960172,440
1950134,606
194080,810
193065,530
192049,520
191044,714
190047,761
189042,210
188041,848
187041,434
186035,686
185028,567
184023,571
18304,042
Source

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

Historic places in Washtenaw

National Register of Historic Places listings in Washtenaw, Michigan.

Litchfield, James, House
Dexter
Saline First Presbyterian Church
Saline
Groves Farm
Northfield Township
Devereaux, Nathan B., Octagon House
Northfield
Ypsilanti Historic District (Boundary Increase)
Ypsilanti
Starkweather Religious Center
Ypsilanti
Metcalf, Robert C. and Bettie J. (Sponseller), House
Ann Arbor
Weinmann Block
Ann Arbor
East Michigan Avenue Historic District
Saline
University Of Michigan Central Campus Historic District
Ann Arbor
Northern Brewery
Ann Arbor
Union Block
Saline
Watson, Henry R., House
Saline
Oakwood Cemetery Mausoleum
Saline
Lutz, George R., House
Saline
Forbes, Jortin, House
Saline
Annin, Joseph, House
Saline
Miller-Walker House
Saline
North Ann Arbor Street Historic District
Saline
Van Duzer, Samuel D., House
Saline
Michigan Central Railroad Depot
Ann Arbor
Sutherland, Landgford and Lydia McMichael, Farmstead
Pittsfield Charter Township
Harris Hall
Ann Arbor
Bell-Spalding House
Ann Arbor
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Other counties in Michigan

Explore census history and historic records for more Michigan counties.

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Everything a full report reveals about Washtenaw County, Michigan

This page charts the census history of Washtenaw County, Michigan. 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 Washtenaw

When does Washtenaw first appear in the US census?
Washtenaw, Michigan first appears in the federal census in 1830, with a recorded population of 4,042.
What is the population of Washtenaw?
At the most recent federal census (2020), Washtenaw had a recorded population of 372,258.
How many historic places are in Washtenaw?
83 sites are listed on the National Register of Historic Places in Washtenaw, Michigan.
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