Census tract · Pima County
Census Tract 21, Pima County, Arizona
Census Tract 21, GEOID 04019002100, in Pima County, Arizona, mostly within Tucson (71% of its census blocks). 5,852 residents in the ACS 2020-2024 5-year estimates (±732); the 2020 Census counted 6,205.
Residents, 2020-2024
5,852
±732 (90% margin)
2020 Census count: 6,205
Median household income
$64,142
±$14,780 (90% margin)
Pima County: $70,315
Median home value
$189,800
±$27,097 (90% margin)
Pima County: $319,700
Median gross rent
$958
±$117 (90% margin)
Pima County: $1,212
Where is Census Tract 21?
Census Tract 21 is one of 270 census tracts in Pima County, Arizona. It covers 2.34 square miles of land, 2,648 residents per square mile in 2020. Its GEOID, 04019002100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Tucson | 71% |
4 census tracts border Census Tract 21: Tract 20 ($63,223), Tract 22.02 ($55,614), Tract 41.18 ($81,680) and Tract 9803*. The figure in brackets is each tract's median household income; * a special land-use tract (water, a park or an institution) with few or no residents.
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 5,852 (±732) in 1,901 households; the 2020 Census counted 6,205 residents and 2,035 housing units.
| Measure | Tract 21 | Tucson |
|---|---|---|
| Total population | 5,852 ±732 | 547,073 |
| Households | 1,901 ±273 | 228,020 |
| Average household size | 3.06 ±0.28 | 2.29 |
| Housing units | 1,991 ±270 | 247,823 |
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 31.4 years old; 29.5% are under 18 and 13.1% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 86.7%, then non-Hispanic white residents at 4.4%. 27.9% of residents were born outside the United States.
| Measure | Tract 21 | Tucson |
|---|---|---|
| Median age | 31.4 ±3.0 | 34.6 |
| Under 18 years | 29.5% ±4.4 pts | 19.3% |
| 65 years and over | 13.1% ±4.3 pts | 16.2% |
| Hispanic or Latino (any race) | 86.7% ±5.2 pts | 42.8% |
| White alone, not Hispanic | 4.4% ±2.0 pts | 43.3% |
| Black or African American alone, not Hispanic | 4.0% ±2.8 pts | 4.8% |
| Asian alone, not Hispanic | 0.6% ±0.9 pts | 3.1% |
| American Indian and Alaska Native alone, not Hispanic | 2.7% ±3.0 pts | 1.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.8 pts | 0.2% |
| Two or more races, not Hispanic | 1.7% ±1.7 pts | 4.3% |
| Some other race alone, not Hispanic | 0.0% ±0.8 pts | 0.4% |
| Born outside the United States | 27.9% ±6.1 pts | 13.4% |
| Speak a language other than English at home (age 5+) | 60.4% ±8.0 pts | 30.1% |
| Civilian veterans (age 18+) | 2.5% ±1.6 pts | 7.8% |
| With a disability | 12.2% ±4.1 pts | 15.2% |
| No health insurance coverage | 18.6% ±7.5 pts | 10.6% |
| High school graduate or higher (age 25+) | 75.7% ±6.8 pts | 88.2% |
| Bachelor's degree or higher (age 25+) | 11.3% ±4.4 pts | 31.1% |
| Graduate or professional degree (age 25+) | 5.3% ±3.5 pts | 12.9% |
| Lived in the same house a year earlier | 81.2% ±8.3 pts | 80.4% |
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 1,901 households in Census Tract 21 earn less than $64,142 a year (±$14,780), against $70,315 across Pima County: 147th highest of the county's 264 tracts with a reliable estimate. 19.6% of residents live below the poverty line.
| Measure | Tract 21 | Tucson |
|---|---|---|
| Median household income | $64,142 ±$14,780 | $57,073 |
| Mean household income | $69,456 ±$6,689 | $76,756 |
| Per capita income | $22,405 ±$2,564 | $32,537 |
| People below the poverty line | 19.6% ±7.7 pts | 18.9% |
| Children under 18 below the poverty line | 31.1% ±15.0 pts | 24.2% |
| Households receiving SNAP | 28.5% ±11.4 pts | 16.4% |
| Households with a computer | 92.6% ±5.0 pts | 95.8% |
| Households with a broadband subscription | 90.7% ±5.2 pts | 90.4% |
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 47.2% of Census Tract 21's occupied homes and renters 52.8%. The median owner-occupied home is valued at $189,800 by its owner (±$27,097). The median renter pays $958 a month including utilities, and 29.6% of renters pay 35% or more of their income on rent.
| Measure | Tract 21 | Tucson |
|---|---|---|
| Median home value (owner-occupied) | $189,800 ±$27,097 | $266,200 |
| Median gross rent | $958 ±$117 | $1,145 |
| Renters paying 35% or more of income on rent | 29.6% ±14.8 pts | 45.9% |
| Median monthly owner costs, with a mortgage | $1,201 ±$135 | $1,482 |
| Owner-occupied homes | 47.2% ±8.8 pts | 51.8% |
| Renter-occupied homes | 52.8% ±8.8 pts | 48.2% |
| Housing units | 1,991 ±270 | 247,823 |
| Single-family detached homes | 70.9% ±10.4 pts | 51.8% |
| Mobile homes | 0.0% ±2.2 pts | 6.1% |
| Built 2020 or later | 0.0% ±2.2 pts | 1.2% |
| Built 2010 to 2019 | 0.0% ±2.2 pts | 4.9% |
| Built 1939 or earlier | 3.2% ±2.6 pts | 3.3% |
| Households with no vehicle | 9.9% ±6.3 pts | 10.1% |
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?
81.0% of Census Tract 21's workers drive alone and 4.5% work from home. The average trip to work takes 20.3 minutes.
| Measure | Tract 21 | Tucson |
|---|---|---|
| In the labor force (age 16+) | 64.8% ±6.2 pts | 61.9% |
| Unemployment rate | 4.2% ±3.0 pts | 6.2% |
| Drove alone to work | 81.0% ±6.0 pts | 68.0% |
| Carpooled | 12.1% ±5.4 pts | 10.5% |
| Public transportation | 1.3% ±1.7 pts | 2.3% |
| Walked | 0.0% ±1.7 pts | 2.6% |
| Worked from home | 4.5% ±2.6 pts | 13.8% |
| Mean travel time to work | 20.3 min ±3.2 | 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 21 compare with the other tracts in Pima County?
Among Pima County's tracts with a reliable estimate, Census Tract 21 ranks as shown below (1 = highest).
| Measure | In Pima County | In Tucson |
|---|---|---|
| Population | 35th of 267 | 19th of 140 |
| Residents per square mile | 136th of 270 | 115th of 143 |
| Median household income | 147th of 264 | 48th of 137 |
| Per capita income | 238th of 266 | 119th of 139 |
| Median home value | 223rd of 257 | 112th of 130 |
| Median gross rent | 211th of 245 | 118th of 137 |
| Poverty rate | 73rd of 179 | 60th of 116 |
| Bachelor's degree or higher | 241st of 263 | 123rd of 137 |
| Median age | 230th of 267 | 109th of 140 |
| Owner-occupied share | 205th of 261 | 88th of 134 |
The tracts next to it on Pima County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 25.05 | 144th | $65,838±$4,350 · within the margin of this tract |
| Tract 30.03 | 145th | $65,580±$11,474 · within the margin of this tract |
| Tract 40.38 | 146th | $65,472±$13,164 · within the margin of this tract |
| Tract 21 | 147th | $64,142±$14,780 |
| Tract 16 | 148th | $64,018±$17,197 · within the margin of this tract |
| Tract 54 | 149th | $63,958±$16,035 · within the margin of this tract |
| Tract 44.23 | 150th | $63,833±$7,328 · 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?
2 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