County · Wisconsin
Ozaukee County, Wisconsin
Ozaukee County, Wisconsin. Ozaukee County had 94,346 residents in 2025 by the Census Bureau's estimate, up 3.1% since 2020, faster than Wisconsin (+1.3%). It holds 17 places (10 cities, villages and boroughs, 6 towns and townships and 1 census-designated) and 22 census tracts. GEOID 55089.
Ozaukee County is one of the 4 counties of the Milwaukee-Waukesha, WI metropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
94,346
Census Bureau estimate (no margin published)
2020 Census count: 91,503 · ACS 2020-2024: 92,966
Median household income
$96,996
±$3,696 (90% margin)
Wisconsin: $77,485
Median home value
$390,200
±$8,212 (90% margin)
Wisconsin: $266,500
Median gross rent
$1,154
±$33 (90% margin)
Wisconsin: $1,087
How many people live in Ozaukee County, and is it growing?
The 2020 Census counted 91,503 residents in Ozaukee County. The Census Bureau estimates 94,346 for July 1, 2025, up 3.1% since 2020, faster than Wisconsin (+1.3%). The 2020-2024 American Community Survey puts the population at 92,966 over 233 square miles of land.
| Measure | Ozaukee County | Wisconsin | Change since 2015-2019 |
|---|---|---|---|
| Total population | 92,966 | 5,914,872 | +4,369 |
| Households | 38,309±352 | 2,479,480 | +2,502 |
| Average household size | 2.38±0.02 | 2.33 | −0.05 |
| Housing units | 39,872±52 | 2,778,572 | +2,427 |
Ozaukee County's population since 2000
From 82,317 in 2000 to 94,346 in 2025: up 14.6%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Ozaukee County?
Ozaukee County holds 17 places: 10 cities, villages and boroughs (incorporated places), 6 towns and townships (county subdivisions with their own government) and 1 census-designated place. The largest is Mequon with 25,120 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Mequon | 25,142 | $144,051 |
|---|---|---|
| Port Washington | 12,353 | $81,948 |
| Cedarburg | 12,121 | $84,896 |
| Grafton | 12,094 | $89,861 |
| Cedarburg (town) | 6,162 | $124,121 |
| Grafton (town) | 4,355 | $87,245 |
| Saukville | 4,258 | $79,730 |
| Thiensville | 3,290 | $95,685 |
| Belgium | 2,421 | $74,886 |
| Fredonia | 2,279 | $99,013 |
| Fredonia (town) | 2,078 | $82,109 |
| Saukville (town) | 1,765 | $106,339 |
| Port Washington (town) | 1,538 | $82,727 |
| Belgium (town) | 1,450 | $91,875 |
| Waubeka | 640 | $75,859 |
| Bayside | 4,482 | $160,096 |
| Newburg | 1,142 | $78,214 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Ozaukee County?
The median resident of Ozaukee County is 43.9 years old; 20.9% are under 18 and 21.6% are 65 or older. The largest group is non-Hispanic white residents at 89.2%, then Hispanic or Latino residents (of any race) at 3.7%. 5.0% of residents were born outside the United States.
| Measure | Ozaukee County | Wisconsin | Change since 2015-2019 |
|---|---|---|---|
| Median age | 43.9±0.2 | 40.2 | no clear change |
| Under 18 years | 20.9% | 21.4% | – |
| 65 years and over | 21.6%±0.1 pts | 18.5% | – |
| Hispanic or Latino (any race) | 3.7% | 8.0% | +0.8 pts |
| White alone, not Hispanic | 89.2%±0.2 pts | 78.6% | −2.3 pts |
| Black or African American alone, not Hispanic | 1.5%±0.2 pts | 5.9% | +0.3 pts |
| Asian alone, not Hispanic | 2.2%±0.2 pts | 2.9% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.1%±0.1 pts | 0.5% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.1 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.0%±0.4 pts | 3.7% | – |
| Some other race alone, not Hispanic | 0.3%±0.2 pts | 0.3% | – |
| Born outside the United States | 5.0%±0.6 pts | 5.2% | no clear change |
| Speak a language other than English at home (age 5+) | 5.8%±0.7 pts | 9.0% | – |
| Civilian veterans (age 18+) | 5.8%±0.6 pts | 6.2% | – |
| With a disability | 10.1%±0.8 pts | 12.3% | – |
| No health insurance coverage | 2.5%±0.5 pts | 5.2% | no clear change |
| High school graduate or higher (age 25+) | 97.8%±0.4 pts | 93.6% | – |
| Bachelor's degree or higher (age 25+) | 51.2%±1.6 pts | 33.4% | +2.2 pts |
| Graduate or professional degree (age 25+) | 19.0%±1.2 pts | 11.4% | – |
| Moved from another state in the past year | 2.0%±0.6 pts | 2.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Ozaukee County earn?
Half of Ozaukee County's 38,309 households earn less than $96,996 a year (±$3,696), against $77,485 in Wisconsin. In 2015-2019 the median was $104,874 in 2024 dollars, so it fell by $7,878 after inflation. 5.0% of residents live below the poverty line.
| Measure | Ozaukee County | Wisconsin | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $96,996±$3,696 | $77,485 | −$7,878 |
| Mean household income | $138,958±$4,650 | $101,466 | – |
| Per capita income | $59,040±$2,042 | $43,373 | no clear change |
| People below the poverty line | 5.0%±0.8 pts | 10.6% | no clear change |
| Children under 18 below the poverty line | 4.8%±1.8 pts | 12.8% | no clear change |
| Households receiving SNAP | 5.0%±0.8 pts | 11.1% | – |
| Households with a broadband subscription | 93.5%±1.1 pts | 90.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Ozaukee County?
Owners occupy 72.9% of Ozaukee County's occupied homes and renters 27.1%. The median owner-occupied home is valued at $390,200 by its owner (±$8,212). The median renter pays $1,154 a month including utilities, and 35.0% of renters pay 35% or more of their income on rent.
| Measure | Ozaukee County | Wisconsin | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $390,200±$8,212 | $266,500 | +$42,529 |
| Median gross rent | $1,154±$33 | $1,087 | no clear change |
| Renters paying 35% or more of income on rent | 35.0%±4.1 pts | 35.0% | no clear change |
| Median monthly owner costs, with a mortgage | $2,090±$56 | $1,689 | – |
| Owner-occupied homes | 72.9%±2.0 pts | 67.8% | −3.0 pts |
| Housing units | 39,872±52 | 2,778,572 | +2,427 |
| Homeowner vacancy rate | 0.6%±0.4 pts | 0.5% | – |
| Rental vacancy rate | 2.6%±1.5 pts | 4.5% | – |
| Single-family detached homes | 65.8%±1.8 pts | 66.2% | – |
| Mobile homes | 0.3%±0.2 pts | 3.1% | – |
| Built 2020 or later | 1.8%±0.4 pts | 1.4% | – |
| Built 1939 or earlier | 10.7%±1.2 pts | 17.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Ozaukee County building?
Builders took permits for 483 new housing units across Ozaukee County in 2025 (293 single-family), 5.1 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Ozaukee County get to work?
74.2% of Ozaukee County's workers drive alone and 17.5% work from home. The average trip to work takes 22.8 minutes. The unemployment rate in 2020-2024 averaged 2.8%.
| Measure | Ozaukee County | Wisconsin | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.7%±1.3 pts | 65.3% | – |
| Unemployment rate | 2.8%±0.5 pts | 3.2% | no clear change |
| Drove alone to work | 74.2%±1.5 pts | 74.4% | – |
| Carpooled | 6.2%±0.8 pts | 7.3% | – |
| Public transportation | 0.1%±0.2 pts | 1.1% | – |
| Walked | 1.1%±0.4 pts | 2.6% | – |
| Worked from home | 17.5%±1.2 pts | 13.1% | +12.2 pts |
| Mean travel time to work | 22.8 min±0.7 | 22.2 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Ozaukee County's census tracts?
Ozaukee County is divided into 22 census tracts. Among those with a reliable estimate, median household income runs from $53,681 (Tract 6401.01) to $188,125 (Tract 6603.04).
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Ozaukee County compare with Wisconsin's other counties?
| Measure | Rank |
|---|---|
| Population | 18th of 72 |
| Growth 2020-2025 | 13th of 72 |
| Residents per square mile | 8th of 72 |
| Median household income | 3rd of 72 |
| Median home value | 3rd of 72 |
| Median gross rent | 5th of 72 |
| Poverty rate | 72nd of 72 |
| Bachelor's degree or higher | 2nd of 72 |
| Median age | 34th of 72 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Ozaukee County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.