Census tract · Milwaukee County
Census Tract 21, Milwaukee County, Wisconsin
Census Tract 21, GEOID 55079002100, in Milwaukee County, Wisconsin, entirely within Milwaukee. 2,018 residents in the ACS 2020-2024 5-year estimates (±337); the 2020 Census counted 2,228.
Residents, 2020-2024
2,018
±337 (90% margin)
2020 Census count: 2,228
Median household income
$31,431
±$4,493 (90% margin)
Milwaukee County: $64,435
Median home value
$109,000
±$23,947 (90% margin)
Milwaukee County: $230,700
Median gross rent
$945
±$71 (90% margin)
Milwaukee County: $1,101
Where is Census Tract 21?
Census Tract 21 is one of 302 census tracts in Milwaukee County, Wisconsin. It covers 0.35 square miles of land, 6,421 residents per square mile in 2020. Its GEOID, 55079002100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Milwaukee | 100% |
4 census tracts border Census Tract 21: Tract 10 ($53,214), Tract 20 ($41,850), Tract 22 ($63,239) and Tract 24 ($35,588). 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 21?
The 2020-2024 American Community Survey puts Census Tract 21's population at 2,018 (±337) in 857 households; the 2020 Census counted 2,228 residents and 1,073 housing units.
| Measure | Tract 21 | Milwaukee |
|---|---|---|
| Total population | 2,018±337 | 566,973 |
| Households | 857±117 | 232,520 |
| Average household size | 2.35±0.27 | 2.37 |
| Housing units | 1,080±97 | 259,101 |
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 21?
The median resident of Census Tract 21 is 33.5 years old; 28.4% are under 18 and 6.2% are 65 or older. The largest group is non-Hispanic Black residents at 88.8%, then non-Hispanic residents of two or more races at 5.7%.
| Measure | Tract 21 | Milwaukee |
|---|---|---|
| Median age | 33.5±3.1 | 32.4 |
| Under 18 years | 28.4%±6.4 pts | 25.4% |
| 65 years and over | 6.2%±1.5 pts | 12.0% |
| Hispanic or Latino (any race) | 1.9%±2.1 pts | 20.9% |
| White alone, not Hispanic | 2.9%±2.2 pts | 31.7% |
| Black or African American alone, not Hispanic | 88.8%±7.9 pts | 37.9% |
| Asian alone, not Hispanic | 0.7%±0.8 pts | 5.0% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.1 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.1 pts | 0.0% |
| Two or more races, not Hispanic | 5.7%±7.0 pts | 3.9% |
| Some other race alone, not Hispanic | 0.0%±1.1 pts | 0.3% |
| Born outside the United States | 3.1%±2.3 pts | 11.1% |
| Speak a language other than English at home (age 5+) | 1.8%±1.5 pts | 22.0% |
| Civilian veterans (age 18+) | 5.3%±3.1 pts | 3.6% |
| With a disability | 16.6%±5.5 pts | 13.5% |
| No health insurance coverage | 10.9%±7.1 pts | 9.1% |
| High school graduate or higher (age 25+) | 84.8%±6.4 pts | 85.5% |
| Bachelor's degree or higher (age 25+) | 8.8%±4.9 pts | 27.4% |
| Graduate or professional degree (age 25+) | 1.2%±1.5 pts | 9.8% |
| Lived in the same house a year earlier | 85.1%±9.7 pts | 85.7% |
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 21 earn?
Half of the 857 households in Census Tract 21 earn less than $31,431 a year (±$4,493), against $64,435 across Milwaukee County: 274th highest of the county's 293 tracts with a reliable estimate. 35.7% of residents live below the poverty line.
| Measure | Tract 21 | Milwaukee |
|---|---|---|
| Median household income | $31,431±$4,493 | $54,234 |
| Mean household income | $43,606±$7,864 | $73,283 |
| Per capita income | $19,948±$3,745 | $30,994 |
| People below the poverty line | 35.7%±12.3 pts | 22.8% |
| Children under 18 below the poverty line | 43.6%±22.6 pts | 31.7% |
| Households receiving SNAP | 49.7%±11.2 pts | 27.9% |
| Households with a computer | 91.7%±7.0 pts | 94.3% |
| Households with a broadband subscription | 81.4%±7.7 pts | 88.2% |
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 21?
Owners occupy 29.5% of Census Tract 21's occupied homes and renters 70.5%. The median owner-occupied home is valued at $109,000 by its owner (±$23,947). The median renter pays $945 a month including utilities, and 51.0% of renters pay 35% or more of their income on rent.
| Measure | Tract 21 | Milwaukee |
|---|---|---|
| Median home value (owner-occupied) | $109,000±$23,947 | $184,000 |
| Median gross rent | $945±$71 | $1,059 |
| Renters paying 35% or more of income on rent | 51.0%±16.7 pts | 42.3% |
| Median monthly owner costs, with a mortgage | $1,319±$116 | $1,533 |
| Owner-occupied homes | 29.5%±7.1 pts | 41.8% |
| Renter-occupied homes | 70.5%±7.1 pts | 58.2% |
| Housing units | 1,080±97 | 259,101 |
| Single-family detached homes | 42.7%±9.1 pts | 39.1% |
| Mobile homes | 1.7%±2.5 pts | 0.4% |
| Built 2020 or later | 0.0%±2.1 pts | 0.5% |
| Built 2010 to 2019 | 2.3%±3.8 pts | 3.7% |
| Built 1939 or earlier | 40.5%±9.8 pts | 34.0% |
| Households with no vehicle | 32.7%±10.6 pts | 16.2% |
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 21 get to work?
64.4% of Census Tract 21's workers drive alone and 23.3% work from home. The average trip to work takes 21.4 minutes. The unemployment rate in 2020-2024 averaged 8.4%.
| Measure | Tract 21 | Milwaukee |
|---|---|---|
| In the labor force (age 16+) | 53.6%±9.0 pts | 64.5% |
| Unemployment rate | 8.4%±5.1 pts | 6.2% |
| Drove alone to work | 64.4%±13.4 pts | 66.3% |
| Carpooled | 7.9%±6.7 pts | 9.9% |
| Public transportation | 4.4%±4.2 pts | 5.0% |
| Walked | 0.0%±3.2 pts | 4.0% |
| Worked from home | 23.3%±9.9 pts | 12.9% |
| Mean travel time to work | 21.4 min±1.6 | 22.4 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 21 compare with the other tracts in Milwaukee County?
Among Milwaukee County's tracts with a reliable estimate, Census Tract 21 ranks as shown below (1 = highest).
| Measure | In Milwaukee County | In Milwaukee |
|---|---|---|
| Population | 233rd of 300 | 146th of 209 |
| Residents per square mile | 157th of 301 | 137th of 210 |
| Median household income | 274th of 293 | 183rd of 202 |
| Per capita income | 249th of 299 | 158th of 208 |
| Median home value | 246th of 276 | 155th of 185 |
| Median gross rent | 233rd of 295 | 157th of 208 |
| Poverty rate | 48th of 246 | 48th of 181 |
| Bachelor's degree or higher | 247th of 264 | 156th of 173 |
| Median age | 180th of 299 | 95th of 208 |
| Owner-occupied share | 235th of 289 | 148th of 198 |
The tracts next to it on Milwaukee County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 39 | 271st | $31,996±$7,886 · within the margin of this tract |
| Tract 1868 | 272nd | $31,830±$9,856 · within the margin of this tract |
| Tract 135 | 273rd | $31,742±$18,158 · within the margin of this tract |
| Tract 21 | 274th | $31,431±$4,493 |
| Tract 26 | 275th | $31,418±$6,865 · within the margin of this tract |
| Tract 90 | 276th | $31,000±$10,208 · within the margin of this tract |
| Tract 46 | 277th | $30,525±$5,599 · 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 21?
3 of the 18 figures for Census Tract 21 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