PlainCities

Census tract · Pima County

Census Tract 40.31, Pima County, Arizona

Census Tract 40.31, GEOID 04019004031, in Pima County, Arizona, mostly within Tucson (96% of its census blocks). 4,231 residents in the ACS 2020-2024 5-year estimates (±859); the 2020 Census counted 4,069.

Residents, 2020-2024

4,231

±859 (90% margin)
2020 Census count: 4,069

Median household income

$80,478

±$6,028 (90% margin)
Pima County: $70,315

Median home value

$423,900

±$49,126 (90% margin)
Pima County: $319,700

Median gross rent

$1,368

±$124 (90% margin)
Pima County: $1,212

Where is Census Tract 40.31?

Census Tract 40.31 is one of 270 census tracts in Pima County, Arizona. It covers 0.89 square miles of land, 4,598 residents per square mile in 2020. Its GEOID, 04019004031, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 40.31 lies in (share of its 2020 census blocks)
PlaceShare of the tract
Tucson96%
Census Tract 40.31 (marked with a dot) in Pima County, Arizona. Boundaries: Census Bureau 2024.
40.3040.3240.4740.5340.80 40.31 1 mi
Census Tract 40.31 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000.

5 census tracts border Census Tract 40.31: Tract 40.30 ($165,859), Tract 40.32 ($76,419), Tract 40.47 ($113,375), Tract 40.53 ($96,908) and Tract 40.80 ($152,929). 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 40.31?

The 2020-2024 American Community Survey puts Census Tract 40.31's population at 4,231 (±859) in 2,171 households; the 2020 Census counted 4,069 residents and 2,336 housing units.

Counts, ACS 2020-2024 5-year estimates
MeasureTract 40.31TucsonPima CountyArizona
Total population4,231±859547,0731,060,4907,378,838
Households2,171±415228,020437,8272,856,081
Average household size1.94±0.172.292.362.53
Housing units2,410±368247,823479,9393,192,839

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 40.31?

The median resident of Census Tract 40.31 is 43.5 years old; 10.9% are under 18 and 31.1% are 65 or older. The largest group is non-Hispanic white residents at 72.2%, then Hispanic or Latino residents (of any race) at 16.6%. 8.5% of residents were born outside the United States.

Age, origin, education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
MeasureTract 40.31TucsonPima CountyArizona
Median age43.5±6.834.639.839.0
Under 18 years10.9%±3.9 pts19.3%19.6%21.6%
65 years and over31.1%±7.5 pts16.2%21.6%18.9%
Hispanic or Latino (any race)16.6%±6.8 pts42.8%36.4%31.4%
White alone, not Hispanic72.2%±9.4 pts43.3%50.5%52.6%
Black or African American alone, not Hispanic0.0%±0.1 pts4.8%3.3%4.4%
Asian alone, not Hispanic3.4%±2.9 pts3.1%2.9%3.5%
American Indian and Alaska Native alone, not Hispanic0.0%±0.2 pts1.2%1.9%3.2%
Native Hawaiian and Other Pacific Islander alone, not Hispanic0.0%±1.1 pts0.2%0.1%0.2%
Two or more races, not Hispanic6.7%±7.6 pts4.3%4.3%4.4%
Some other race alone, not Hispanic0.9%±1.5 pts0.4%0.5%0.5%
Born outside the United States8.5%±4.2 pts13.4%11.8%13.0%
Speak a language other than English at home (age 5+)8.9%±4.9 pts30.1%25.7%25.7%
Civilian veterans (age 18+)13.6%±5.4 pts7.8%9.4%7.9%
With a disability15.1%±5.6 pts15.2%15.0%13.8%
No health insurance coverage3.7%±2.5 pts10.6%8.6%10.5%
High school graduate or higher (age 25+)99.5%±0.6 pts88.2%90.5%89.4%
Bachelor's degree or higher (age 25+)49.8%±8.9 pts31.1%36.8%33.3%
Graduate or professional degree (age 25+)20.5%±7.1 pts12.9%16.0%13.0%
Lived in the same house a year earlier86.6%±6.5 pts80.4%84.0%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 40.31 earn?

Half of the 2,171 households in Census Tract 40.31 earn less than $80,478 a year (±$6,028), against $70,315 across Pima County: 100th highest of the county's 264 tracts with a reliable estimate.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
MeasureTract 40.31TucsonPima CountyArizona
Median household income$80,478±$6,028$57,073$70,315$79,964
Mean household income$95,498±$13,674$76,756$95,999$108,273
Per capita income$50,484±$9,491$32,537$40,140$42,503
People below the poverty line9.2%±6.1 pts18.9%14.3%12.5%
Children under 18 below the poverty line4.6%±7.7 pts24.2%18.6%16.2%
Households receiving SNAP7.6%±5.7 pts16.4%12.1%10.4%
Households with a computer100.0%±2.0 pts95.8%96.4%96.4%
Households with a broadband subscription98.6%±1.7 pts90.4%91.9%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 40.31?

Owners occupy 65.7% of Census Tract 40.31's occupied homes and renters 34.3%. The median owner-occupied home is valued at $423,900 by its owner (±$49,126). The median renter pays $1,368 a month including utilities, and 49.3% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
MeasureTract 40.31TucsonPima CountyArizona
Median home value (owner-occupied)$423,900±$49,126$266,200$319,700$394,500
Median gross rent$1,368±$124$1,145$1,212$1,543
Renters paying 35% or more of income on rent49.3%±22.9 pts45.9%44.1%42.2%
Median monthly owner costs, with a mortgage$2,270±$887$1,482$1,656$1,803
Owner-occupied homes65.7%±9.3 pts51.8%65.2%67.4%
Renter-occupied homes34.3%±9.3 pts48.2%34.8%32.6%
Housing units2,410±368247,823479,9393,192,839
Single-family detached homes62.3%±9.8 pts51.8%59.9%64.2%
Mobile homes0.0%±1.8 pts6.1%9.6%9.3%
Built 2020 or later0.0%±1.8 pts1.2%1.9%2.8%
Built 2010 to 20196.5%±4.6 pts4.9%8.1%11.6%
Built 1939 or earlier0.0%±1.8 pts3.3%2.0%1.4%
Households with no vehicle0.4%±1.1 pts10.1%7.1%5.4%

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 40.31 get to work?

64.7% of Census Tract 40.31's workers drive alone and 22.0% work from home. The average trip to work takes 17.3 minutes. The unemployment rate in 2020-2024 averaged 6.6%.

Work and commuting, ACS 2020-2024 5-year estimates
MeasureTract 40.31TucsonPima CountyArizona
In the labor force (age 16+)49.7%±8.0 pts61.9%58.0%60.6%
Unemployment rate6.6%±4.3 pts6.2%5.5%5.1%
Drove alone to work64.7%±13.5 pts68.0%69.3%66.8%
Carpooled13.3%±9.9 pts10.5%9.7%9.8%
Public transportation0.0%±2.6 pts2.3%1.5%1.0%
Walked0.0%±2.6 pts2.6%1.8%1.7%
Worked from home22.0%±9.6 pts13.8%15.4%18.4%
Mean travel time to work17.3 min±3.921.9 min24.3 min25.4 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 40.31 compare with the other tracts in Pima County?

Among Pima County's tracts with a reliable estimate, Census Tract 40.31 ranks as shown below (1 = highest).

Census Tract 40.31's rank among the tracts of Pima County and of Tucson
MeasureIn Pima CountyIn Tucson
Population96th of 26752nd of 140
Residents per square mile74th of 27067th of 143
Median household income100th of 26423rd of 137
Per capita income65th of 26610th of 139
Median home value56th of 2579th of 130
Median gross rent104th of 24534th of 137
Bachelor's degree or higher72nd of 26321st of 137
Median age101st of 26728th of 140
Owner-occupied share146th of 26140th of 134

The tracts next to it on Pima County's income ladder

Median household income, ACS 2020-2024 5-year estimates
TractRankMedian household incomeResidents
Tract 40.5797th$81,403±$12,634 · within the margin of this tract4,393
Tract 35.0498th$80,785±$10,127 · within the margin of this tract3,012
Tract 32.0199th$80,568±$13,683 · within the margin of this tract2,972
Tract 40.31100th$80,478±$6,0284,231
Tract 44.34101st$80,164±$25,753 · within the margin of this tract2,818
Tract 44.14102nd$79,375±$11,000 · within the margin of this tract2,837
Tract 47.23103rd$79,161±$10,027 · within the margin of this tract4,684

"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 40.31?

3 of the 18 figures for Census Tract 40.31 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