• county
  • FIPS 55089
  • Largest town: Mequon

Ozaukee County, Wisconsin

Ozaukee County had 93,956 residents in the Census Vintage 2024 estimate, on 233.0 square miles of land. It ranks 18th of 72 in Wisconsin by population and 71st by land area.

Population
93,956
#18 of 72 in Wisconsin · #652 in US
Area
233.0 sq mi
#71 of 72 in Wisconsin · #2,943 in US
Density
403 / sq mi
#7 of 72 in Wisconsin · #340 in US
Median household income
$98,394
#3 of 72 in Wisconsin · #152 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Ozaukee County within Wisconsin. Pin: Madison.

Measure from here

Tools and pages that start from Ozaukee County

Ozaukee County population, land area and income

Ozaukee County had 93,956 residents in the Census Vintage 2024 estimate, on 233.0 square miles of land. It ranks 18th of 72 in Wisconsin by population and 71st by land area. That works out to 403.2 people per square mile, 4.2 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Wisconsin has 41,821 residents, so Ozaukee County is 2.2 times that size.

Its SAIPE 2023 median household income of $98,394 is in the top tenth among 3,143 counties with an estimate.

National rank among 3,144

Population

93,956

3144th1st

652nd of 3,144 (US)

Land area

233 sq mi

3144th1st

2943rd of 3,144 (US)

Density

403.2 / sq mi

3144th1st

340th of 3,144 (US)

Median household income

$98,394

3143rd1st

152nd of 3,143 (US)

Rank within Wisconsin (72)

Population

93,956

72nd1st

18th of 72 (WI)

Land area

233 sq mi

72nd1st

71st of 72 (WI)

Density

403.2 / sq mi

72nd1st

7th of 72 (WI)

Median household income

$98,394

72nd1st

3rd of 72 (WI)

How Ozaukee County's population changed since 2020

Ozaukee County gained 2,329 residents between the July 2020 and July 2024 estimates, a rise of 2.5%. That ranks 13th of 72 in Wisconsin for growth. The median Wisconsin county changed by +1.0%, and the state as a whole by +1.1%.

Since the April 2020 estimates base, Ozaukee County recorded 3,509 births and 3,872 deaths, a natural change of -363. Net international migration added +789 and net domestic migration, people moving to or from other US counties, came to +2,053. The largest single component was domestic migration, which added 2,053 people.

91.6k202092.6k202193.1k202293.5k202394.0k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
3,509
Deaths
3,872
Net international migration
+789
Net domestic migration
+2,053
Change, July 2023 to July 2024
+436

Where Ozaukee County is

The Census internal point of Ozaukee County is at 43.501800, -87.847600. It sits in UTM zone 16N. The map shades Wisconsin's 72 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Ozaukee County outlined. Dots are towns of 1,000+ people with residents in it.

Barron County: +0.2%Green County: +0.4%Dunn County: +1.5%Jefferson County: +0.0%Lincoln County: +0.1%Rusk County: -0.1%Fond du Lac County: +0.1%Marquette County: +1.0%Outagamie County: +2.3%Waupaca County: -1.2%Oneida County: +0.8%Eau Claire County: +2.8%Washington County: +1.4%Portage County: +2.3%Menominee County: +0.7%Clark County: +0.5%Monroe County: +0.2%Milwaukee County: -1.5%Buffalo County: +1.1%Lafayette County: +4.2%Ozaukee County: +2.5%Rock County: +1.0%Sheboygan County: +0.2%Green Lake County: +1.8%Waukesha County: +2.3%Calumet County: +2.1%Dodge County: -0.8%Wood County: -0.3%Winnebago County: +0.9%Sawyer County: +4.0%Dane County: +4.6%Sauk County: +1.1%Pepin County: +2.9%Adams County: +3.2%Price County: +0.4%Taylor County: +1.1%Grant County: +0.7%Trempealeau County: -0.0%Vernon County: +2.1%Waushara County: +2.2%Iowa County: +1.0%Crawford County: -0.5%Kenosha County: -0.3%Shawano County: +1.1%Juneau County: -0.7%Jackson County: -0.3%Vilas County: +3.7%Bayfield County: +3.7%Chippewa County: +1.5%Iron County: +1.5%Racine County: +0.3%Door County: +1.3%Ashland County: +1.1%Kewaunee County: +0.9%Polk County: +1.8%Florence County: +2.4%Douglas County: -0.2%Forest County: +3.7%Columbia County: -0.7%Walworth County: +0.7%La Crosse County: +0.1%Manitowoc County: +0.1%Oconto County: +2.5%Langlade County: +0.4%Marathon County: +0.7%Washburn County: +2.2%Brown County: +1.8%Richland County: -0.9%Marinette County: +1.1%St. Croix County: +4.3%Pierce County: +2.7%Burnett County: +3.7%
Change 2020 to 2024
  1. < +0.1%
  2. < +0.7%
  3. < +1.3%
  4. < +2.3%
  5. ≥ +2.3%
no data

Orange pin: Ozaukee County internal point. Dark pin: Madison.

Internal point

Decimal
43.501800, -87.847600
DMS
43°30'6.48"N 87°50'51.36"W
UTM
16N 431478.2E 4816890.2N
Geohash
dp9x2zr26
Plus code
86MJG522+PX

Towns in Ozaukee County

10 incorporated places of 1,000+ people have residents in Ozaukee County, 76,425 people together, or 81% of the county. Each figure counts only the part of the town inside Ozaukee County; towns marked "part" extend into another county. The largest is Mequon with 25,329.

  1. 01Mequon25,329
  2. 02Cedarburg13,011
  3. 03Port Washington12,750
  4. 04Grafton12,741
  5. 05Saukville4,305
  6. 06Thiensville3,299
  7. 07Belgium2,515
  8. 08Fredonia2,281
  9. 09Bayside (part)102
  10. 10Newburg (part)92
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Ozaukee County

The Census 2024 county adjacency file lists 6 neighbors for Ozaukee County, including 2 across a state line. The most populous is Milwaukee County, WI, with 924,740 residents. Distances run between Census internal points in a straight line.

Distance to Madison and the nearest big city

Madison is 82.7 miles WSW of Ozaukee County's internal point in a straight line. The nearest place of 100,000 or more is Milwaukee, WI (population 563,531), 30.9 miles away. The nearest place of 10,000 or more is Port Washington, WI (population 12,750), 8.3 miles away.

Ozaukee County FIPS code

The FIPS code of Ozaukee County is 55089: state code 55 for Wisconsin plus county code 089. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $98,394.

Questions people ask

What is the population of Ozaukee County, Wisconsin?

The Census Vintage 2024 estimate for July 1, 2024 is 93,956. That is up 2,329 people (2.5%) from the July 2020 estimate of 91,627.

What is the FIPS code of Ozaukee County?

55089. The first two digits (55) are Wisconsin; the last three (089) identify the county.

What is the largest town in Ozaukee County?

Mequon, with 25,329 residents inside Ozaukee County in 2024.

Which counties border Ozaukee County?

6 county-equivalents border it in the Census 2024 adjacency file: Milwaukee County, WI; Waukesha County, WI; Muskegon County, MI; Washington County, WI; Sheboygan County, WI; Oceana County, MI.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.