Census tract · Ozaukee County
Census Tract 6603.03, Ozaukee County, Wisconsin
Census Tract 6603.03, GEOID 55089660303, in Ozaukee County, Wisconsin, entirely within Mequon. 4,527 residents in the ACS 2020-2024 5-year estimates (±399); the 2020 Census counted 5,133.
Residents, 2020-2024
4,527
±399 (90% margin)
2020 Census count: 5,133
Median household income
$165,690
±$26,441 (90% margin)
Ozaukee County: $96,996
Median home value
$518,700
±$68,859 (90% margin)
Ozaukee County: $390,200
Median gross rent
$1,009
±$984 (90% margin)
Ozaukee County: $1,154
Where is Census Tract 6603.03?
Census Tract 6603.03 is one of 22 census tracts in Ozaukee County, Wisconsin. It covers 5.01 square miles of land, 1,024 residents per square mile in 2020. Its GEOID, 55089660303, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Mequon | 100% |
6 census tracts border Census Tract 6603.03: Tract 301 in Milwaukee County ($156,528), Tract 401 in Milwaukee County ($204,427), Tract 501.03 in Milwaukee County ($72,219), Tract 6602.02 ($108,750), Tract 6603.01 ($161,250) and Tract 6603.04 ($188,125). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 6603.03?
The 2020-2024 American Community Survey puts Census Tract 6603.03's population at 4,527 (±399) in 1,831 households; the 2020 Census counted 5,133 residents and 2,336 housing units.
| Measure | Tract 6603.03 | Mequon |
|---|---|---|
| Total population | 4,527 ±399 | 25,270 |
| Households | 1,831 ±183 | 9,444 |
| Average household size | 2.44 ±0.18 | 2.54 |
| Housing units | 2,117 ±150 | 10,078 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 6603.03?
The median resident of Census Tract 6603.03 is 52.5 years old; 21.6% are under 18 and 32.5% are 65 or older. The largest group is non-Hispanic white residents at 87.4%, then Hispanic or Latino residents (of any race) at 3.9%. 5.5% of residents were born outside the United States.
| Measure | Tract 6603.03 | Mequon |
|---|---|---|
| Median age | 52.5 ±3.4 | 47.7 |
| Under 18 years | 21.6% ±2.8 pts | 22.1% |
| 65 years and over | 32.5% ±4.0 pts | 25.4% |
| Hispanic or Latino (any race) | 3.9% ±3.2 pts | 4.3% |
| White alone, not Hispanic | 87.4% ±5.3 pts | 84.6% |
| Black or African American alone, not Hispanic | 2.7% ±1.7 pts | 2.5% |
| Asian alone, not Hispanic | 3.0% ±2.4 pts | 4.4% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.5 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.5 pts | 0.0% |
| Two or more races, not Hispanic | 3.0% ±2.6 pts | 3.6% |
| Some other race alone, not Hispanic | 0.0% ±0.5 pts | 0.3% |
| Born outside the United States | 5.5% ±2.6 pts | 8.2% |
| Speak a language other than English at home (age 5+) | 7.0% ±4.4 pts | 8.8% |
| Civilian veterans (age 18+) | 6.0% ±2.4 pts | 4.0% |
| With a disability | 9.9% ±3.5 pts | 9.5% |
| No health insurance coverage | 1.1% ±1.1 pts | 1.8% |
| High school graduate or higher (age 25+) | 99.2% ±0.6 pts | 98.9% |
| Bachelor's degree or higher (age 25+) | 68.4% ±6.1 pts | 69.6% |
| Graduate or professional degree (age 25+) | 28.2% ±5.1 pts | 30.9% |
| Lived in the same house a year earlier | 87.9% ±5.1 pts | 91.1% |
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 Census Tract 6603.03 earn?
Half of the 1,831 households in Census Tract 6603.03 earn less than $165,690 a year (±$26,441), against $96,996 across Ozaukee County: 2nd highest of the county's 21 tracts with a reliable estimate. 3.4% of residents live below the poverty line.
| Measure | Tract 6603.03 | Mequon |
|---|---|---|
| Median household income | $165,690 ±$26,441 | $144,051 |
| Mean household income | $215,551 ±$32,642 | $209,325 |
| Per capita income | $87,856 ±$12,358 | $81,362 |
| People below the poverty line | 3.4% ±2.2 pts | 4.2% |
| Children under 18 below the poverty line | 0.0% ±2.3 pts | 5.5% |
| Households receiving SNAP | 2.3% ±2.0 pts | 2.1% |
| Households with a computer | 95.5% ±2.6 pts | 97.3% |
| Households with a broadband subscription | 94.9% ±3.2 pts | 95.6% |
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 Census Tract 6603.03?
Owners occupy 85.8% of Census Tract 6603.03's occupied homes and renters 14.2%. The median owner-occupied home is valued at $518,700 by its owner (±$68,859).
| Measure | Tract 6603.03 | Mequon |
|---|---|---|
| Median home value (owner-occupied) | $518,700 ±$68,859 | $501,600 |
| Median gross rent | $1,009 ±$984 | $2,157 |
| Renters paying 35% or more of income on rent | 56.1% ±27.2 pts | 43.9% |
| Median monthly owner costs, with a mortgage | $2,712 ±$299 | $2,568 |
| Owner-occupied homes | 85.8% ±5.9 pts | 86.0% |
| Renter-occupied homes | 14.2% ±5.9 pts | 14.0% |
| Housing units | 2,117 ±150 | 10,078 |
| Single-family detached homes | 64.0% ±5.8 pts | 72.4% |
| Mobile homes | 0.0% ±1.1 pts | 0.1% |
| Built 2020 or later | 1.3% ±1.5 pts | 2.0% |
| Built 2010 to 2019 | 5.6% ±2.5 pts | 8.5% |
| Built 1939 or earlier | 3.7% ±3.0 pts | 5.0% |
| Households with no vehicle | 7.0% ±5.2 pts | 4.3% |
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 do people in Census Tract 6603.03 get to work?
67.4% of Census Tract 6603.03's workers drive alone and 26.8% work from home. The average trip to work takes 20.0 minutes.
| Measure | Tract 6603.03 | Mequon |
|---|---|---|
| In the labor force (age 16+) | 55.6% ±5.6 pts | 61.1% |
| Unemployment rate | 2.2% ±3.2 pts | 2.6% |
| Drove alone to work | 67.4% ±8.6 pts | 67.3% |
| Carpooled | 5.8% ±3.4 pts | 5.6% |
| Public transportation | 0.0% ±1.1 pts | 0.0% |
| Walked | 0.0% ±1.1 pts | 0.8% |
| Worked from home | 26.8% ±8.3 pts | 25.8% |
| Mean travel time to work | 20.0 min ±3.1 | 21.9 min |
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
How does Census Tract 6603.03 compare with the other tracts in Ozaukee County?
Among Ozaukee County's tracts with a reliable estimate, Census Tract 6603.03 ranks as shown below (1 = highest).
| Measure | In Ozaukee County | In Mequon |
|---|---|---|
| Population | 10th of 21 | 4th of 5 |
| Residents per square mile | 11th of 21 | 2nd of 5 |
| Median household income | 2nd of 21 | 2nd of 5 |
| Per capita income | 2nd of 21 | 2nd of 5 |
| Median home value | 2nd of 21 | 2nd of 5 |
| Poverty rate | 12th of 14 | 2nd of 2 |
| Bachelor's degree or higher | 3rd of 21 | 3rd of 5 |
| Median age | 1st of 21 | 1st of 5 |
| Owner-occupied share | 6th of 21 | 4th of 5 |
The tracts next to it on Ozaukee County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 6603.04 | 1st | $188,125±$27,317 · within the margin of this tract |
| Tract 6603.03 | 2nd | $165,690±$26,441 |
| Tract 6603.01 | 3rd | $161,250±$35,353 · within the margin of this tract |
| Tract 6602.01 | 4th | $146,750±$31,645 · within the margin of this tract |
| Tract 6503 | 5th | $124,867±$21,553 |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 6603.03?
3 of the 18 figures for Census Tract 6603.03 on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections