Wisconsin Counties
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Wisconsin Counties

There are seventy-two counties in the state of Wisconsin. Wisconsin became part of the Territory of Michigan and divided into two counties: Brown County in the northeast along Lake Michigan and Crawford County in the southwest along the Mississippi River. The state of Wisconsin was created from Wisconsin Territory on May 29, 1848, with 28 counties.

Ozaukee County, Wisconsin

Ozaukee County Education, Geography, and History

Ozaukee County, Wisconsin Courthouse

Ozaukee County is a county in the state of Wisconsin. Based on the 2010 census, the population was 86,395. Its county seat is Port Washington.

Ozaukee County is included in the Milwaukee-Waukesha-West Allis, WI Metropolitan Statistical Area.

Etymology - Origin of Ozaukee County Name

Ozaukee is the Chippewa form of the tribal name of the Sauk. The word is commonly asserted to mean "people living at the mouth of a river." Others interpret it as signifying "people of yellow earth." In Chippewa, this means Osagig, Sacs, an Indian tribe. Ozaukee county and Sauk county, both corrupt of ozagig, meaning "people living at a river mouth" o-aug-egg, meaning "mouth of the river people."

[Source: Legler, Wisconsin Place Names, p. 32. Gannett, Place Names, p. 200 Card file at the WHS library reference desk]


County QuickFacts: CensusBureau Quick Facts

Ozaukee County History

"Ozaukee" is the Chippewa form of the tribal name of the Sauk. The word is likely to mean "people living at the mouth of a river."

Ozaukee County is the smallest land area County in the State of Wisconsin, covering 235 square miles of land area. Located on 25 miles of the western shores of Lake Michigan, the County encompasses approximately 900 square miles of Lake Michigan waters. Ozaukee County is home to 86,697 people.

OZAUKEE.--Population 12,977.
From: Handbook of Wisconsin by S. Silas, 1855
pg. 93

A Lake County, lying next Milwaukee on the north. It is small, containing but eight towns. Most of the farms of this County are small, and by this sub-division, they have been brought to a high degree of cultivation. Ozaukee is the principal port.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 2,891 km2 (1,116sq mi). 232 square miles (601 km2) of it is land and 884 square miles (2,290 km2) of it (79.22%) is water.

Ozaukee County is the smallest land area county in the State of Wisconsin, covering approximately 609 km2. The County is located in the southeastern corner of Wisconsin, on 45 km of western Lake Michigan shoreline (Figure 1). Elevation ranges from 177 to 294 m above sea level, and except for a few isolated spots where dolomite bedrock is exposed at the surface, the entire County is covered with glacial deposits ranging from large boulders to fine-grained clays. Soils are generally classified as: "silty clay loam till", "loam to clay loam", and "organic mucky peat"(Parker, et al. 1970). There is east-west variation in temperature and precipitation in Ozaukee County due to the presence of Lake Michigan, with average monthly temperatures ranging from -7.1 to 20.7 o C and precipitation and snowfall averaging 77 and 93 cm per year respectively (NRCS WETS Station 1999). Surface drainage is provided by approximately 250 km of rivers, streams, and creeks, all of which eventually flow into Lake Michigan. These streams are geologically young (established after the last glaciation), and as a result of inefficient drainage, many marshes, bogs, and small lakes were formed in the County landscape. Current land use is variable and includes: residential, commercial, industrial, agricultural, wetlands, woodlands, and unused rural/open lands. The amount of land in Ozaukee County devoted to urban land uses has increased by 170% since 1963 (SEWRPC 1997).

Neighboring Counties

Bordering counties are as follows:

  • Sheboygan County - north
  • Milwaukee County - south
  • Waukesha County - southwest
  • Washington County - west


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