Census tract · Madison County
Census Tract 31, Madison County, Alabama
Census Tract 31, GEOID 01089003100, in Madison County, Alabama, entirely within Huntsville. 4,474 residents in the ACS 2020-2024 5-year estimates (±324); the 2020 Census counted 3,699.
Residents, 2020-2024
4,474
±324 (90% margin)
2020 Census count: 3,699
Median household income
$94,141
±$18,364 (90% margin)
Madison County: $86,499
Median home value
$736,600
±$428,671 (90% margin)
Madison County: $299,200
Median gross rent
$1,363
±$142 (90% margin)
Madison County: $1,209
Where is Census Tract 31?
Census Tract 31 is one of 95 census tracts in Madison County, Alabama. It covers 1.65 square miles of land, 2,236 residents per square mile in 2020. Its GEOID, 01089003100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Huntsville | 100% |
6 census tracts border Census Tract 31: Tract 10 ($77,445), Tract 12 ($21,680), Tract 17 ($182,981), Tract 19.01 ($160,517), Tract 20 ($111,745) and Tract 30. 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 31?
The 2020-2024 American Community Survey puts Census Tract 31's population at 4,474 (±324) in 1,595 households; the 2020 Census counted 3,699 residents and 1,716 housing units.
| Measure | Tract 31 | Huntsville |
|---|---|---|
| Total population | 4,474 ±324 | 222,791 |
| Households | 1,595 ±183 | 95,310 |
| Average household size | 1.67 ±0.11 | 2.22 |
| Housing units | 1,809 ±175 | 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 31?
The median resident of Census Tract 31 is 40.0 years old; 7.3% are under 18 and 18.6% are 65 or older. The largest group is non-Hispanic white residents at 63.1%, then non-Hispanic Black residents at 19.9%. 5.0% of residents were born outside the United States.
| Measure | Tract 31 | Huntsville |
|---|---|---|
| Median age | 40.0 ±2.0 | 36.9 |
| Under 18 years | 7.3% ±3.0 pts | 19.4% |
| 65 years and over | 18.6% ±4.5 pts | 16.4% |
| Hispanic or Latino (any race) | 4.9% ±2.4 pts | 8.0% |
| White alone, not Hispanic | 63.1% ±4.6 pts | 55.9% |
| Black or African American alone, not Hispanic | 19.9% ±3.9 pts | 28.8% |
| Asian alone, not Hispanic | 1.6% ±1.1 pts | 2.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.6 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.1% |
| Two or more races, not Hispanic | 10.2% ±4.0 pts | 4.6% |
| Some other race alone, not Hispanic | 0.0% ±0.9 pts | 0.3% |
| Born outside the United States | 5.0% ±2.3 pts | 6.7% |
| Speak a language other than English at home (age 5+) | 4.7% ±2.1 pts | 8.4% |
| Civilian veterans (age 18+) | 7.5% ±2.6 pts | 10.0% |
| With a disability | 19.1% ±5.9 pts | 14.4% |
| No health insurance coverage | 0.5% ±0.6 pts | 9.0% |
| High school graduate or higher (age 25+) | 80.3% ±3.8 pts | 92.0% |
| Bachelor's degree or higher (age 25+) | 40.7% ±4.6 pts | 47.2% |
| Graduate or professional degree (age 25+) | 18.9% ±3.5 pts | 19.7% |
| Lived in the same house a year earlier | 62.3% ±6.0 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 31 earn?
Half of the 1,595 households in Census Tract 31 earn less than $94,141 a year (±$18,364), against $86,499 across Madison County: 41st highest of the county's 94 tracts with a reliable estimate. 15.0% of residents live below the poverty line.
| Measure | Tract 31 | Huntsville |
|---|---|---|
| Median household income | $94,141 ±$18,364 | $74,714 |
| Mean household income | $139,588 ±$30,388 | $106,477 |
| Per capita income | $54,880 ±$10,375 | $46,854 |
| People below the poverty line | 15.0% ±5.9 pts | 12.6% |
| Children under 18 below the poverty line | 3.9% ±6.3 pts | 17.0% |
| Households receiving SNAP | 8.1% ±4.1 pts | 9.1% |
| Households with a computer | 91.2% ±6.1 pts | 96.7% |
| Households with a broadband subscription | 87.3% ±7.1 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 31?
Owners occupy 36.9% of Census Tract 31's occupied homes and renters 63.1%. The median owner-occupied home is valued at $736,600 by its owner (±$428,671). The median renter pays $1,363 a month including utilities, and 27.7% of renters pay 35% or more of their income on rent.
| Measure | Tract 31 | Huntsville |
|---|---|---|
| Median home value (owner-occupied) | $736,600 ±$428,671 | $293,600 |
| Median gross rent | $1,363 ±$142 | $1,171 |
| Renters paying 35% or more of income on rent | 27.7% ±10.1 pts | 36.6% |
| Median monthly owner costs, with a mortgage | $3,625 ±$1,173 | $1,573 |
| Owner-occupied homes | 36.9% ±7.6 pts | 58.3% |
| Renter-occupied homes | 63.1% ±7.6 pts | 41.7% |
| Housing units | 1,809 ±175 | 104,388 |
| Single-family detached homes | 41.3% ±6.3 pts | 63.1% |
| Mobile homes | 0.0% ±2.2 pts | 1.4% |
| Built 2020 or later | 2.2% ±2.3 pts | 4.5% |
| Built 2010 to 2019 | 27.5% ±6.8 pts | 15.8% |
| Built 1939 or earlier | 39.1% ±6.9 pts | 2.9% |
| Households with no vehicle | 16.5% ±6.4 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 31 get to work?
73.2% of Census Tract 31's workers drive alone and 14.8% work from home. The average trip to work takes 16.5 minutes.
| Measure | Tract 31 | Huntsville |
|---|---|---|
| In the labor force (age 16+) | 34.6% ±4.1 pts | 64.0% |
| Unemployment rate | 0.5% ±0.8 pts | 4.1% |
| Drove alone to work | 73.2% ±8.7 pts | 76.3% |
| Carpooled | 5.5% ±3.5 pts | 6.0% |
| Public transportation | 0.0% ±2.7 pts | 0.2% |
| Walked | 4.6% ±3.3 pts | 1.3% |
| Worked from home | 14.8% ±7.0 pts | 14.6% |
| Mean travel time to work | 16.5 min ±2.9 | 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 31 compare with the other tracts in Madison County?
Among Madison County's tracts with a reliable estimate, Census Tract 31 ranks as shown below (1 = highest).
| Measure | In Madison County | In Huntsville |
|---|---|---|
| Population | 42nd of 95 | 28th of 70 |
| Residents per square mile | 30th of 95 | 25th of 70 |
| Median household income | 41st of 94 | 28th of 69 |
| Per capita income | 32nd of 95 | 25th of 70 |
| Median home value | 1st of 92 | 1st of 68 |
| Median gross rent | 37th of 85 | 28th of 63 |
| Poverty rate | 23rd of 52 | 21st of 40 |
| Bachelor's degree or higher | 56th of 93 | 44th of 68 |
| Median age | 47th of 95 | 35th of 70 |
| Owner-occupied share | 79th of 93 | 57th of 69 |
The tracts next to it on Madison County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 113.01 | 38th | $96,955±$11,182 · within the margin of this tract |
| Tract 9.01 | 39th | $96,599±$16,866 · within the margin of this tract |
| Tract 27.22 | 40th | $94,474±$31,428 · within the margin of this tract |
| Tract 31 | 41st | $94,141±$18,364 |
| Tract 29.11 | 42nd | $93,936±$17,490 · within the margin of this tract |
| Tract 107.06 | 43rd | $93,879±$13,431 · within the margin of this tract |
| Tract 106.12 | 44th | $92,601±$5,136 · 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 31?
1 of the 18 figures for Census Tract 31 on this page carries a coefficient of variation over 40% and is 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