Census tract · San Joaquin County
Census Tract 52.21, San Joaquin County, California
Census Tract 52.21, GEOID 06077005221, in San Joaquin County, California, entirely within Mountain House. 9,357 residents in the ACS 2020-2024 5-year estimates (±1,248); the 2020 Census counted 9,532.
Residents, 2020-2024
9,357
±1,248 (90% margin)
2020 Census count: 9,532
Median household income
$179,614
±$38,453 (90% margin)
San Joaquin County: $92,179
Median home value
$966,100
±$66,206 (90% margin)
San Joaquin County: $530,700
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
San Joaquin County: $1,734
Where is Census Tract 52.21?
Census Tract 52.21 is one of 174 census tracts in San Joaquin County, California. It covers 1.14 square miles of land, 8,376 residents per square mile in 2020. Its GEOID, 06077005221, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Mountain House | 100% |
3 census tracts border Census Tract 52.21: Tract 4511.04 in Alameda County ($183,846), Tract 52.22 ($171,141) and Tract 52.23 ($192,990). 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 52.21?
The 2020-2024 American Community Survey puts Census Tract 52.21's population at 9,357 (±1,248) in 2,647 households; the 2020 Census counted 9,532 residents and 2,706 housing units.
| Measure | Tract 52.21 | Mountain House |
|---|---|---|
| Total population | 9,357 ±1,248 | 25,513 |
| Households | 2,647 ±400 | 7,067 |
| Average household size | 3.53 ±0.34 | 3.61 |
| Housing units | 2,711 ±391 | 7,349 |
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 52.21?
The median resident of Census Tract 52.21 is 38.8 years old; 23.7% are under 18 and 6.0% are 65 or older. The largest group is non-Hispanic Asian residents at 49.8%, then non-Hispanic white residents at 19.7%. 43.2% of residents were born outside the United States.
| Measure | Tract 52.21 | Mountain House |
|---|---|---|
| Median age | 38.8 ±4.6 | 35.0 |
| Under 18 years | 23.7% ±3.7 pts | 31.9% |
| 65 years and over | 6.0% ±2.0 pts | 6.4% |
| Hispanic or Latino (any race) | 10.0% ±4.2 pts | 8.3% |
| White alone, not Hispanic | 19.7% ±5.2 pts | 19.2% |
| Black or African American alone, not Hispanic | 10.2% ±7.1 pts | 6.6% |
| Asian alone, not Hispanic | 49.8% ±9.0 pts | 57.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.4 pts | 0.5% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.5 pts | 0.0% |
| Two or more races, not Hispanic | 10.1% ±8.2 pts | 7.8% |
| Some other race alone, not Hispanic | 0.0% ±0.5 pts | 0.4% |
| Born outside the United States | 43.2% ±6.0 pts | 45.9% |
| Speak a language other than English at home (age 5+) | 50.2% ±7.6 pts | 55.7% |
| Civilian veterans (age 18+) | 4.2% ±3.8 pts | 2.4% |
| With a disability | 7.7% ±3.1 pts | 6.0% |
| No health insurance coverage | 6.0% ±3.9 pts | 5.1% |
| High school graduate or higher (age 25+) | 95.9% ±2.8 pts | 93.9% |
| Bachelor's degree or higher (age 25+) | 49.4% ±10.8 pts | 54.1% |
| Graduate or professional degree (age 25+) | 21.6% ±6.8 pts | 25.9% |
| Lived in the same house a year earlier | 79.2% ±7.2 pts | 79.0% |
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 52.21 earn?
Half of the 2,647 households in Census Tract 52.21 earn less than $179,614 a year (±$38,453), against $92,179 across San Joaquin County: 5th highest of the county's 170 tracts with a reliable estimate. 6.3% of residents live below the poverty line.
| Measure | Tract 52.21 | Mountain House |
|---|---|---|
| Median household income | $179,614 ±$38,453 | $177,163 |
| Mean household income | $200,707 ±$28,683 | $191,895 |
| Per capita income | $56,993 ±$7,121 | $53,560 |
| People below the poverty line | 6.3% ±3.5 pts | 5.0% |
| Children under 18 below the poverty line | 6.0% ±5.1 pts | 4.6% |
| Households receiving SNAP | 9.0% ±7.0 pts | 6.4% |
| Households with a computer | 98.8% ±2.1 pts | 99.2% |
| Households with a broadband subscription | 97.0% ±3.1 pts | 94.8% |
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 52.21?
Owners occupy 62.0% of Census Tract 52.21's occupied homes and renters 38.0%. The median owner-occupied home is valued at $966,100 by its owner (±$66,206). The median renter pays $3,500 or more a month including utilities.
| Measure | Tract 52.21 | Mountain House |
|---|---|---|
| Median home value (owner-occupied) | $966,100 ±$66,206 | $946,900 |
| Median gross rent | $3,500 or more | $3,500 or more |
| Renters paying 35% or more of income on rent | 9.4% ±10.3 pts | 25.3% |
| Median monthly owner costs, with a mortgage | $3,912 ±$297 | $3,901 |
| Owner-occupied homes | 62.0% ±12.1 pts | 69.9% |
| Renter-occupied homes | 38.0% ±12.1 pts | 30.1% |
| Housing units | 2,711 ±391 | 7,349 |
| Single-family detached homes | 91.0% ±6.2 pts | 83.5% |
| Mobile homes | 0.0% ±1.6 pts | 3.0% |
| Built 2020 or later | 1.7% ±1.7 pts | 11.2% |
| Built 2010 to 2019 | 46.7% ±11.2 pts | 44.9% |
| Built 1939 or earlier | 0.0% ±1.6 pts | 0.1% |
| Households with no vehicle | 0.0% ±1.6 pts | 3.4% |
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 52.21 get to work?
57.9% of Census Tract 52.21's workers drive alone and 28.5% work from home. The average trip to work takes 44.0 minutes. The unemployment rate in 2020-2024 averaged 4.8%.
| Measure | Tract 52.21 | Mountain House |
|---|---|---|
| In the labor force (age 16+) | 66.2% ±5.7 pts | 67.2% |
| Unemployment rate | 4.8% ±2.0 pts | 3.5% |
| Drove alone to work | 57.9% ±9.9 pts | 60.1% |
| Carpooled | 7.1% ±3.2 pts | 11.3% |
| Public transportation | 0.5% ±0.8 pts | 0.8% |
| Walked | 0.0% ±1.0 pts | 0.0% |
| Worked from home | 28.5% ±9.0 pts | 25.5% |
| Mean travel time to work | 44.0 min ±4.8 | 49.6 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 52.21 compare with the other tracts in San Joaquin County?
Among San Joaquin County's tracts with a reliable estimate, Census Tract 52.21 ranks as shown below (1 = highest).
| Measure | In San Joaquin County | In Mountain House |
|---|---|---|
| Population | 7th of 174 | 2nd of 3 |
| Residents per square mile | 37th of 174 | 1st of 3 |
| Median household income | 5th of 170 | 2nd of 3 |
| Per capita income | 16th of 173 | 1st of 3 |
| Median home value | 3rd of 172 | 2nd of 3 |
| Median gross rent | 1st of 166 | 1st of 3 |
| Poverty rate | 100th of 112 | 1st of 2 |
| Bachelor's degree or higher | 6th of 155 | 2nd of 3 |
| Median age | 44th of 174 | 1st of 3 |
| Owner-occupied share | 88th of 170 | 3rd of 3 |
The tracts next to it on San Joaquin County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 55.02 | 2nd | $197,083±$27,113 · within the margin of this tract |
| Tract 52.15 | 3rd | $194,070±$48,472 · within the margin of this tract |
| Tract 52.23 | 4th | $192,990±$43,736 · within the margin of this tract |
| Tract 52.21 | 5th | $179,614±$38,453 |
| Tract 52.12 | 6th | $177,361±$27,207 · within the margin of this tract |
| Tract 52.22 | 7th | $171,141±$11,417 · within the margin of this tract |
| Tract 52.19 | 8th | $168,027±$10,056 · 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 52.21?
1 of the 18 figures for Census Tract 52.21 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