Census tract · Madison County
Census Tract 21, Madison County, Alabama
Census Tract 21, GEOID 01089002100, in Madison County, Alabama, mostly within Huntsville (99% of its census blocks). 2,858 residents in the ACS 2020-2024 5-year estimates (±752); the 2020 Census counted 3,182.
Residents, 2020-2024
2,858
±752 (90% margin)
2020 Census count: 3,182
Median household income
$25,855
±$5,964 (90% margin)
Madison County: $86,499
Median home value
$174,500
±$156,704 (90% margin)
Madison County: $299,200
Median gross rent
$890
±$90 (90% margin)
Madison County: $1,209
Where is Census Tract 21?
Census Tract 21 is one of 95 census tracts in Madison County, Alabama. It covers 1.30 square miles of land, 2,440 residents per square mile in 2020. Its GEOID, 01089002100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Huntsville | 99% |
6 census tracts border Census Tract 21: Tract 12 ($21,680), Tract 15 ($46,716), Tract 20 ($111,745), Tract 22 ($39,128), Tract 23 ($34,253) and Tract 25.01 ($26,071). 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 2,858 (±752) in 1,395 households; the 2020 Census counted 3,182 residents and 1,811 housing units.
| Measure | Tract 21 | Huntsville |
|---|---|---|
| Total population | 2,858 ±752 | 222,791 |
| Households | 1,395 ±285 | 95,310 |
| Average household size | 2.03 ±0.34 | 2.22 |
| Housing units | 1,722 ±273 | 104,388 |
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 37.6 years old; 30.2% are under 18 and 18.3% are 65 or older. The largest group is non-Hispanic Black residents at 46.9%, then non-Hispanic white residents at 26.8%. 22.0% of residents were born outside the United States.
| Measure | Tract 21 | Huntsville |
|---|---|---|
| Median age | 37.6 ±16.9 | 36.9 |
| Under 18 years | 30.2% ±7.4 pts | 19.4% |
| 65 years and over | 18.3% ±6.9 pts | 16.4% |
| Hispanic or Latino (any race) | 15.2% ±12.5 pts | 8.0% |
| White alone, not Hispanic | 26.8% ±9.6 pts | 55.9% |
| Black or African American alone, not Hispanic | 46.9% ±15.0 pts | 28.8% |
| Asian alone, not Hispanic | 0.7% ±1.1 pts | 2.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.4 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.4 pts | 0.1% |
| Two or more races, not Hispanic | 10.5% ±12.5 pts | 4.6% |
| Some other race alone, not Hispanic | 0.0% ±1.4 pts | 0.3% |
| Born outside the United States | 22.0% ±9.9 pts | 6.7% |
| Speak a language other than English at home (age 5+) | 32.1% ±16.4 pts | 8.4% |
| Civilian veterans (age 18+) | 11.7% ±6.2 pts | 10.0% |
| With a disability | 20.5% ±7.3 pts | 14.4% |
| No health insurance coverage | 13.3% ±6.0 pts | 9.0% |
| High school graduate or higher (age 25+) | 79.8% ±9.1 pts | 92.0% |
| Bachelor's degree or higher (age 25+) | 36.8% ±14.3 pts | 47.2% |
| Graduate or professional degree (age 25+) | 15.6% ±11.6 pts | 19.7% |
| Lived in the same house a year earlier | 83.7% ±10.4 pts | 83.2% |
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 1,395 households in Census Tract 21 earn less than $25,855 a year (±$5,964), against $86,499 across Madison County: 93rd highest of the county's 94 tracts with a reliable estimate. 30.6% of residents live below the poverty line.
| Measure | Tract 21 | Huntsville |
|---|---|---|
| Median household income | $25,855 ±$5,964 | $74,714 |
| Mean household income | $42,729 ±$11,053 | $106,477 |
| Per capita income | $21,577 ±$5,006 | $46,854 |
| People below the poverty line | 30.6% ±15.1 pts | 12.6% |
| Children under 18 below the poverty line | 29.5% ±25.0 pts | 17.0% |
| Households receiving SNAP | 26.6% ±10.4 pts | 9.1% |
| Households with a computer | 86.1% ±7.1 pts | 96.7% |
| Households with a broadband subscription | 85.4% ±7.5 pts | 91.8% |
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 27.0% of Census Tract 21's occupied homes and renters 73.0%. The median renter pays $890 a month including utilities, and 64.8% of renters pay 35% or more of their income on rent.
| Measure | Tract 21 | Huntsville |
|---|---|---|
| Median home value (owner-occupied) | $174,500 ±$156,704 | $293,600 |
| Median gross rent | $890 ±$90 | $1,171 |
| Renters paying 35% or more of income on rent | 64.8% ±17.1 pts | 36.6% |
| Median monthly owner costs, with a mortgage | $1,267 ±$426 | $1,573 |
| Owner-occupied homes | 27.0% ±9.5 pts | 58.3% |
| Renter-occupied homes | 73.0% ±9.5 pts | 41.7% |
| Housing units | 1,722 ±273 | 104,388 |
| Single-family detached homes | 41.5% ±10.9 pts | 63.1% |
| Mobile homes | 0.0% ±2.3 pts | 1.4% |
| Built 2020 or later | 3.8% ±5.0 pts | 4.5% |
| Built 2010 to 2019 | 5.9% ±4.1 pts | 15.8% |
| Built 1939 or earlier | 2.7% ±2.5 pts | 2.9% |
| Households with no vehicle | 27.6% ±12.2 pts | 4.9% |
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?
75.4% of Census Tract 21's workers drive alone. The average trip to work takes 15.7 minutes.
| Measure | Tract 21 | Huntsville |
|---|---|---|
| In the labor force (age 16+) | 53.8% ±9.7 pts | 64.0% |
| Unemployment rate | 17.5% ±17.3 pts | 4.1% |
| Drove alone to work | 75.4% ±11.9 pts | 76.3% |
| Carpooled | 15.0% ±10.5 pts | 6.0% |
| Public transportation | 0.0% ±4.1 pts | 0.2% |
| Walked | 4.4% ±6.5 pts | 1.3% |
| Worked from home | 3.9% ±4.5 pts | 14.6% |
| Mean travel time to work | 15.7 min ±2.6 | 19.7 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 Madison County?
Among Madison County's tracts with a reliable estimate, Census Tract 21 ranks as shown below (1 = highest).
| Measure | In Madison County | In Huntsville |
|---|---|---|
| Population | 77th of 95 | 55th of 70 |
| Residents per square mile | 21st of 95 | 17th of 70 |
| Median household income | 93rd of 94 | 68th of 69 |
| Per capita income | 89th of 95 | 64th of 70 |
| Median gross rent | 80th of 85 | 58th of 63 |
| Poverty rate | 6th of 52 | 6th of 40 |
| Bachelor's degree or higher | 60th of 93 | 46th of 68 |
| Median age | 59th of 95 | 43rd of 70 |
| Owner-occupied share | 88th of 93 | 64th of 69 |
The tracts next to it on Madison County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 23 | 90th | $34,253±$3,806 |
| Tract 3.02 | 91st | $32,162±$5,935 · within the margin of this tract |
| Tract 25.01 | 92nd | $26,071±$6,658 · within the margin of this tract |
| Tract 21 | 93rd | $25,855±$5,964 |
| Tract 12 | 94th | $21,680±$4,320 · 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?
4 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