Census tract · Santa Clara County
Census Tract 5121, Santa Clara County, California
Census Tract 5121, GEOID 06085512100, in Santa Clara County, California, partly within San Jose. 1,710 residents in the ACS 2020-2024 5-year estimates (±376); the 2020 Census counted 1,755.
Residents, 2020-2024
1,710
±376 (90% margin)
2020 Census count: 1,755
Median household income
$121,563
±$52,336 (90% margin)
Santa Clara County: $164,281
Median home value
$1,600,400
±$71,862 (90% margin)
Santa Clara County: $1,490,600
Median gross rent
$2,331
±$294 (90% margin)
Santa Clara County: $2,857
Where is Census Tract 5121?
Census Tract 5121 is one of 408 census tracts in Santa Clara County, California. It covers 22.11 square miles of land, 79 residents per square mile in 2020. Its GEOID, 06085512100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Jose | 43% |
7 census tracts border Census Tract 5121: Tract 5119.11 ($167,639), Tract 5120.35 ($198,632), Tract 5120.38 ($101,308), Tract 5122 ($250,000 or more), Tract 5123.05 ($247,321), Tract 5123.11 ($139,074) and Tract 5135 ($102,750). 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 5121?
The 2020-2024 American Community Survey puts Census Tract 5121's population at 1,710 (±376) in 453 households; the 2020 Census counted 1,755 residents and 518 housing units.
| Measure | Tract 5121 | Santa Clara County |
|---|---|---|
| Total population | 1,710±376 | 1,902,047 |
| Households | 453±107 | 659,353 |
| Average household size | 3.72±0.62 | 2.82 |
| Housing units | 453±107 | 698,837 |
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 5121?
The median resident of Census Tract 5121 is 37.1 years old; 24.6% are under 18 and 14.7% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 59.1%, then non-Hispanic white residents at 24.6%. 32.7% of residents were born outside the United States.
| Measure | Tract 5121 | Santa Clara County |
|---|---|---|
| Median age | 37.1±3.4 | 38.1 |
| Under 18 years | 24.6%±6.1 pts | 20.5% |
| 65 years and over | 14.7%±5.3 pts | 14.8% |
| Hispanic or Latino (any race) | 59.1%±9.2 pts | 25.0% |
| White alone, not Hispanic | 24.6%±8.4 pts | 27.2% |
| Black or African American alone, not Hispanic | 0.6%±1.1 pts | 2.2% |
| Asian alone, not Hispanic | 13.4%±6.8 pts | 40.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±2.5 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±2.5 pts | 0.4% |
| Two or more races, not Hispanic | 2.0%±1.4 pts | 4.2% |
| Some other race alone, not Hispanic | 0.3%±0.4 pts | 0.6% |
| Born outside the United States | 32.7%±10.8 pts | 41.5% |
| Speak a language other than English at home (age 5+) | 57.6%±10.6 pts | 55.2% |
| Civilian veterans (age 18+) | 4.2%±2.9 pts | 2.6% |
| With a disability | 7.4%±2.7 pts | 9.0% |
| No health insurance coverage | 5.3%±4.3 pts | 3.9% |
| High school graduate or higher (age 25+) | 73.6%±9.6 pts | 89.3% |
| Bachelor's degree or higher (age 25+) | 17.9%±6.4 pts | 56.5% |
| Graduate or professional degree (age 25+) | 3.8%±2.2 pts | 28.3% |
| Lived in the same house a year earlier | 96.7%±3.1 pts | 86.0% |
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 5121 earn?
Half of the 453 households in Census Tract 5121 earn less than $121,563 a year (±$52,336), against $164,281 across Santa Clara County: 312th highest of the county's 404 tracts with a reliable estimate.
| Measure | Tract 5121 | Santa Clara County |
|---|---|---|
| Median household income | $121,563±$52,336 | $164,281 |
| Mean household income | $210,002±$70,066 | $227,007 |
| Per capita income | $56,315±$16,927 | $80,312 |
| People below the poverty line | 6.9%±4.8 pts | 7.1% |
| Children under 18 below the poverty line | 5.3%±6.2 pts | 7.0% |
| Households receiving SNAP | 0.7%±1.8 pts | 6.6% |
| Households with a computer | 100.0%±8.9 pts | 98.0% |
| Households with a broadband subscription | 92.1%±5.1 pts | 95.6% |
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 5121?
Owners occupy 43.5% of Census Tract 5121's occupied homes and renters 56.5%. The median owner-occupied home is valued at $1,600,400 by its owner (±$71,862). The median renter pays $2,331 a month including utilities, and 47.7% of renters pay 35% or more of their income on rent.
| Measure | Tract 5121 | Santa Clara County |
|---|---|---|
| Median home value (owner-occupied) | $1,600,400±$71,862 | $1,490,600 |
| Median gross rent | $2,331±$294 | $2,857 |
| Renters paying 35% or more of income on rent | 47.7%±24.3 pts | 36.4% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 43.5%±12.0 pts | 55.1% |
| Renter-occupied homes | 56.5%±12.0 pts | 44.9% |
| Housing units | 453±107 | 698,837 |
| Single-family detached homes | 74.6%±10.8 pts | 50.7% |
| Mobile homes | 13.2%±9.6 pts | 2.8% |
| Built 2020 or later | 0.9%±1.5 pts | 1.5% |
| Built 2010 to 2019 | 2.9%±2.7 pts | 9.1% |
| Built 1939 or earlier | 8.6%±6.4 pts | 4.7% |
| Households with no vehicle | 0.9%±1.4 pts | 6.0% |
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 5121 get to work?
62.1% of Census Tract 5121's workers drive alone and 27.1% work from home. The average trip to work takes 30.9 minutes.
| Measure | Tract 5121 | Santa Clara County |
|---|---|---|
| In the labor force (age 16+) | 64.7%±7.0 pts | 67.4% |
| Unemployment rate | 2.5%±2.7 pts | 4.9% |
| Drove alone to work | 62.1%±9.5 pts | 59.9% |
| Carpooled | 10.3%±7.3 pts | 9.0% |
| Public transportation | 0.0%±5.5 pts | 2.3% |
| Walked | 0.5%±2.2 pts | 2.1% |
| Worked from home | 27.1%±10.2 pts | 23.9% |
| Mean travel time to work | 30.9 min±4.8 | 26.2 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 5121 compare with the other tracts in Santa Clara County?
Among Santa Clara County's tracts with a reliable estimate, Census Tract 5121 ranks as shown below (1 = highest).
| Measure | In Santa Clara County |
|---|---|
| Population | 404th of 408 |
| Residents per square mile | 404th of 408 |
| Median household income | 312th of 404 |
| Per capita income | 300th of 408 |
| Median home value | 157th of 395 |
| Median gross rent | 320th of 394 |
| Bachelor's degree or higher | 390th of 408 |
| Median age | 261st of 408 |
| Owner-occupied share | 286th of 397 |
The tracts next to it on Santa Clara County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 5032.22 | 309th | $122,526±$44,497 · within the margin of this tract |
| Tract 5067.02 | 310th | $122,050±$27,964 · within the margin of this tract |
| Tract 5046.02 | 311th | $121,953±$40,288 · within the margin of this tract |
| Tract 5121 | 312th | $121,563±$52,336 |
| Tract 5064.02 | 313th | $121,413±$30,365 · within the margin of this tract |
| Tract 5083.05 | 314th | $121,145±$21,327 · within the margin of this tract |
| Tract 5039.02 | 315th | $121,083±$25,285 · 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 5121?
2 of the 18 figures for Census Tract 5121 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