Wisconsin

Ozaukee

91,503
2020 population
1860
first census record
17
census records

About Ozaukee

Ozaukee, Wisconsin, first appears in the United States federal census in 1860, when it recorded a population of 15,682. At the most recent census, in 2020, its population stood at 91,503.

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

On the ground today, 2 documented military engagements have been recorded within the county, among them Fox Wars — First Fox War, Draft Resistance — Ozaukee County Wisconsin, and 42 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
202091,503
201086,395
200082,317
199072,831
198066,981
197054,421
196038,441
195023,361
194018,985
193017,394
192016,335
191017,123
190016,363
189014,943
188015,461
187015,564
186015,682
Source

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

Battles & engagements in Ozaukee

Military engagements that took place in Ozaukee, Wisconsin.

Fox Wars — First Fox War
1712
Draft Resistance — Ozaukee County Wisconsin
1862

Historic places in Ozaukee

National Register of Historic Places listings in Ozaukee, Wisconsin.

Port Washington Downtown Historic District
Port Washington
Payne Hotel
Saukville
Concordia Mill
Cedarburg
Nieman, Edwin J., Sr., House
Mequon
Port Washington Light Station
Port Washington
Columbia Historic District
Cedarburg
Cedarburg Mill
Cedarburg
SENATOR (steam screw) Shipwreck
Port Washington
J.M. ALLMENDINGER (Steambarge) Shipwreck
Mequon
Hilgen and Wittenberg Woolen Mill
Cedarburg
Green Bay Road Historic District
Thiensville
Grafton Flour Mill
Grafton
Jahn, William F., Farmstead
Mequon
Bigelow School
Mequon
Voigt, Jacob, House
Mequon
Moquon Town Hall and Fire Station Complex
Mequon
Kendall Cabinet Shop
Fredonia
Washington Avenue Historic District
Cedarburg
NIAGARA (steamer)
Belgium
Port Washington Fire Engine House
Port Washington
ISLAND CITY (schooner) Shipwreck
Mequon
Covered Bridge
Cedarburg
Stony Hill School
waubeka
Cedarburg Woolen Co. Worsted Mill
Grafton
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Other counties in Wisconsin

Explore census history and historic records for more Wisconsin counties.

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Everything a full report reveals about Ozaukee County, Wisconsin

This page charts the census history of Ozaukee County, Wisconsin. 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 Ozaukee

When does Ozaukee first appear in the US census?
Ozaukee, Wisconsin first appears in the federal census in 1860, with a recorded population of 15,682.
What is the population of Ozaukee?
At the most recent federal census (2020), Ozaukee had a recorded population of 91,503.
Were any battles fought in Ozaukee?
2 documented military engagements took place in Ozaukee, including Fox Wars — First Fox War, Draft Resistance — Ozaukee County Wisconsin.
How many historic places are in Ozaukee?
42 sites are listed on the National Register of Historic Places in Ozaukee, Wisconsin.
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