Census tract · Winnebago County
Census Tract 18.03, Winnebago County, Wisconsin
Census Tract 18.03, GEOID 55139001803, in Winnebago County, Wisconsin, mostly within Oshkosh (62% of its census blocks). 6,354 residents in the ACS 2020-2024 5-year estimates (±581); the 2020 Census counted 6,075.
Residents, 2020-2024
6,354
±581 (90% margin)
2020 Census count: 6,075
Median household income
$63,000
±$21,145 (90% margin)
Winnebago County: $74,925
Median home value
$289,600
±$34,240 (90% margin)
Winnebago County: $225,800
Median gross rent
$945
±$65 (90% margin)
Winnebago County: $965
Where is Census Tract 18.03?
Census Tract 18.03 is one of 45 census tracts in Winnebago County, Wisconsin. It covers 4.22 square miles of land, 1,441 residents per square mile in 2020. Its GEOID, 55139001803, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Oshkosh | 62% |
| Algoma (town) | 38% |
5 census tracts border Census Tract 18.03: Tract 10 ($55,810), Tract 11 ($57,091), Tract 18.01 ($92,664), Tract 18.04 ($110,296) and Tract 20.02 ($94,082). 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 18.03?
The 2020-2024 American Community Survey puts Census Tract 18.03's population at 6,354 (±581) in 3,190 households; the 2020 Census counted 6,075 residents and 2,986 housing units.
| Measure | Tract 18.03 | Oshkosh |
|---|---|---|
| Total population | 6,354 ±581 | 66,729 |
| Households | 3,190 ±375 | 27,451 |
| Average household size | 1.95 ±0.16 | 2.20 |
| Housing units | 3,320 ±362 | 29,423 |
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 18.03?
The median resident of Census Tract 18.03 is 47.5 years old; 15.1% are under 18 and 30.5% are 65 or older. The largest group is non-Hispanic white residents at 91.8%, then non-Hispanic Asian residents at 5.9%.
| Measure | Tract 18.03 | Oshkosh |
|---|---|---|
| Median age | 47.5 ±3.9 | 34.4 |
| Under 18 years | 15.1% ±2.9 pts | 17.3% |
| 65 years and over | 30.5% ±5.2 pts | 15.4% |
| Hispanic or Latino (any race) | 0.4% ±0.5 pts | 4.3% |
| White alone, not Hispanic | 91.8% ±4.7 pts | 81.6% |
| Black or African American alone, not Hispanic | 0.5% ±0.7 pts | 4.9% |
| Asian alone, not Hispanic | 5.9% ±4.3 pts | 4.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.4 pts | 0.4% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.4 pts | 0.1% |
| Two or more races, not Hispanic | 1.3% ±1.0 pts | 4.4% |
| Some other race alone, not Hispanic | 0.1% ±0.1 pts | 0.1% |
| Born outside the United States | 5.4% ±3.6 pts | 3.8% |
| Speak a language other than English at home (age 5+) | 6.1% ±3.7 pts | 6.8% |
| Civilian veterans (age 18+) | 7.0% ±2.8 pts | 5.9% |
| With a disability | 15.8% ±4.7 pts | 13.9% |
| No health insurance coverage | 5.0% ±2.6 pts | 5.1% |
| High school graduate or higher (age 25+) | 95.8% ±2.3 pts | 93.1% |
| Bachelor's degree or higher (age 25+) | 41.8% ±6.5 pts | 27.3% |
| Graduate or professional degree (age 25+) | 16.5% ±5.8 pts | 8.9% |
| Lived in the same house a year earlier | 88.8% ±4.3 pts | 81.6% |
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 18.03 earn?
Half of the 3,190 households in Census Tract 18.03 earn less than $63,000 a year (±$21,145), against $74,925 across Winnebago County: 29th highest of the county's 45 tracts with a reliable estimate. 8.7% of residents live below the poverty line.
| Measure | Tract 18.03 | Oshkosh |
|---|---|---|
| Median household income | $63,000 ±$21,145 | $62,188 |
| Mean household income | $89,429 ±$12,801 | $77,040 |
| Per capita income | $45,934 ±$5,844 | $33,003 |
| People below the poverty line | 8.7% ±4.5 pts | 17.5% |
| Children under 18 below the poverty line | 5.2% ±7.5 pts | 20.9% |
| Households receiving SNAP | 2.4% ±1.9 pts | 12.3% |
| Households with a computer | 98.4% ±1.4 pts | 95.9% |
| Households with a broadband subscription | 95.9% ±4.4 pts | 91.5% |
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 18.03?
Owners occupy 61.9% of Census Tract 18.03's occupied homes and renters 38.1%. The median owner-occupied home is valued at $289,600 by its owner (±$34,240). The median renter pays $945 a month including utilities, and 20.9% of renters pay 35% or more of their income on rent.
| Measure | Tract 18.03 | Oshkosh |
|---|---|---|
| Median home value (owner-occupied) | $289,600 ±$34,240 | $177,700 |
| Median gross rent | $945 ±$65 | $935 |
| Renters paying 35% or more of income on rent | 20.9% ±10.0 pts | 34.6% |
| Median monthly owner costs, with a mortgage | $1,517 ±$127 | $1,362 |
| Owner-occupied homes | 61.9% ±6.0 pts | 55.0% |
| Renter-occupied homes | 38.1% ±6.0 pts | 45.0% |
| Housing units | 3,320 ±362 | 29,423 |
| Single-family detached homes | 43.1% ±5.9 pts | 55.8% |
| Mobile homes | 0.0% ±0.7 pts | 1.0% |
| Built 2020 or later | 1.1% ±1.3 pts | 1.1% |
| Built 2010 to 2019 | 4.7% ±2.8 pts | 5.7% |
| Built 1939 or earlier | 1.7% ±1.8 pts | 26.9% |
| Households with no vehicle | 8.1% ±5.3 pts | 7.7% |
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 18.03 get to work?
69.3% of Census Tract 18.03's workers drive alone and 23.9% work from home. The average trip to work takes 16.3 minutes.
| Measure | Tract 18.03 | Oshkosh |
|---|---|---|
| In the labor force (age 16+) | 62.9% ±4.9 pts | 64.1% |
| Unemployment rate | 3.9% ±4.2 pts | 2.8% |
| Drove alone to work | 69.3% ±7.7 pts | 75.8% |
| Carpooled | 4.7% ±3.1 pts | 8.2% |
| Public transportation | 0.0% ±0.7 pts | 0.8% |
| Walked | 2.2% ±2.0 pts | 3.3% |
| Worked from home | 23.9% ±7.4 pts | 10.4% |
| Mean travel time to work | 16.3 min ±2.2 | 18.1 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 18.03 compare with the other tracts in Winnebago County?
Among Winnebago County's tracts with a reliable estimate, Census Tract 18.03 ranks as shown below (1 = highest).
| Measure | In Winnebago County | In Oshkosh |
|---|---|---|
| Population | 1st of 45 | 1st of 21 |
| Residents per square mile | 31st of 45 | 17th of 21 |
| Median household income | 29th of 45 | 12th of 21 |
| Per capita income | 15th of 45 | 3rd of 21 |
| Median home value | 12th of 45 | 4th of 21 |
| Median gross rent | 23rd of 44 | 9th of 20 |
| Poverty rate | 25th of 38 | 17th of 20 |
| Bachelor's degree or higher | 9th of 44 | 3rd of 20 |
| Median age | 6th of 45 | 3rd of 21 |
| Owner-occupied share | 27th of 44 | 10th of 20 |
The tracts next to it on Winnebago County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 9 | 26th | $67,034±$11,970 · within the margin of this tract |
| Tract 28 | 27th | $64,332±$13,324 · within the margin of this tract |
| Tract 8 | 28th | $63,382±$17,351 · within the margin of this tract |
| Tract 18.03 | 29th | $63,000±$21,145 |
| Tract 34 | 30th | $61,913±$16,593 · within the margin of this tract |
| Tract 33 | 31st | $61,793±$15,471 · within the margin of this tract |
| Tract 37.01 | 32nd | $61,205±$11,022 · within the margin of this tract |
"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 18.03?
3 of the 18 figures for Census Tract 18.03 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