What is the population of Ozaukee County?

The population of Ozaukee County, WI is 90,043.

Where is Ozaukee County located?

Ozaukee County, WI is located at latitude 43.4030500 and longitude -87.8906300. It is in United States.

What is the area of Ozaukee County?

The area of Ozaukee County, WI is 2891 km².

What is the elevation of Ozaukee County?

Ozaukee County, WI has an elevation of 177 meters (581 feet) above sea level.

What time zone is Ozaukee County in?

Ozaukee County, WI is in the America/Chicago time zone.

How has the population of Ozaukee County changed?

The population of Ozaukee County, WI has increased from 86,395 (2010) to 90,043 (2020), a change of 4.2%.

Ozaukee County, Wisconsin

Ozaukee County: county in Wisconsin, United States

About

Ozaukee County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 86,395 and a population density of 30 people per km². After 10 years in 2020 county had an estimated population of 90,043 inhabitants. Its county seat is Port Washington. The county was created 173 years ago in 1852.

Ozaukee County locator map — Location of Ozaukee County on Wisconsin map.

County Snapshot

Ozaukee County at a glance

Ozaukee County currently has 9 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Wisconsin counties

Open related pages

Largest city

Mequon

Population 24,765

Quick Facts about Ozaukee County

Population	90,043 (2020)
Country	United States of America
State	Wisconsin (United States)
Area	2891 km²
Latitude & Longitude	43.4031,-87.8906
Named for	Sauk people
Altitude	771 feet / 235 meters
Capital	Port Washington
Establishment	January 01, 1853
Time Zone	Central Time Zone
Local time	00:50:07 (16th April 2026)
Density	31 Pop. per km² as of 2020
Population growth	4.05% (2010-2020)

Old-Ozaukee-Courthouse Jul-09 image

Geography

Ozaukee County is located at 43°24'11"N 87°53'26"W (43.4030500, -87.8906300). It has 6 neighbors: Muskegon County, Oceana County, Milwaukee County, Sheboygan County, Washington County and Waukesha County.

Ozaukee County map

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The largest city of Ozaukee County is Mequon with a population of 24,765. Other cities include, Cedarburg population 6,080, Grafton population 4,178, Thiensville population 3,116 and Fredonia population 2,168. See all Ozaukee County cities & populated places.

Ozaukee County Populated Places

Cities, towns, neighborhoods & other populated places in Ozaukee County.

City Name	Population	Title
Mequon	24,765	Fourth-class city in Ozaukee County, Wisconsin
Cedarburg	6,080	City in Ozaukee County, Wisconsin, Untied States
Grafton	4,178	Village in Ozaukee County, Wisconsin
Thiensville	3,116	Village in Ozaukee County, Wisconsin, United States
Fredonia	2,168	Village in Ozaukee County, Wisconsin, United States
Kohler	2,048	Village in Sheboygan County, Wisconsin, United States
Saukville	1,864	Village in Ozaukee County, Wisconsin, United States
Port Washington	1,584	Fourth-class city in and county seat of Ozaukee County, Wisconsin
Belgium	1,444	Village in Ozaukee County, Wisconsin

Official website of Ozaukee County

Official Website

Ozaukee County has 6 neighbours.

Muskegon County county in Michigan, United States
Oceana County county in Michigan, United States
Milwaukee County county in Wisconsin, United States
Sheboygan County county in Wisconsin, United States
Washington County county in Wisconsin, United States
Waukesha County county in Wisconsin, United States

Port Washington

Demographics

The population of Ozaukee County increased by 4.05% in 10 years.

Year	Population	% Change	Method
2010	86,395	-	census
2011	86,798	0.46%	estimation process
2012	87,111	0.36%	estimation process
2013	87,213	0.12%	estimation process
2014	87,578	0.42%	estimation process
2015	87,932	0.4%	estimation process
2016	88,332	0.45%	estimation process
2017	88,443	0.13%	estimation process
2018	89,059	0.69%	estimation process
2019	89,221	0.18%	estimation process
2020	90,043	0.91%	estimation process

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Wisconsin Other Counties (more counties)

County Name	Population	Title
Milwaukee County	945,016	County in Wisconsin, United States
Milwaukee	589,067	The thirtieth most populous city in the United States and the center of the Milwaukee metropolitan area.
Dane County	552,536	County in Wisconsin, United States
Waukesha County	406,172	County in Wisconsin, United States
Brown County	264,610	County in Texas, United States
Racine County	195,802	County in Wisconsin, United States
Outagamie County	188,766	County in Wisconsin, United States
Winnebago County	171,631	County in Wisconsin, United States
Kenosha County	169,671	County in Wisconsin, United States
Rock County	163,084	County in Wisconsin, United States
Washington County	136,445	County in Wisconsin, United States
Marathon County	135,593	County in Wisconsin, United States
La Crosse County	118,502	County in Wisconsin, United States
Sheboygan County	115,240	County in Wisconsin, United States
Eau Claire County	105,260	County in Wisconsin, United States
Walworth County	103,953	County in Wisconsin, United States