Census tract · Alameda County
Census Tract 4421, Alameda County, California
Census Tract 4421, GEOID 06001442100, in Alameda County, California, entirely within Fremont. 5,064 residents in the ACS 2020-2024 5-year estimates (±674); the 2020 Census counted 5,265.
Residents, 2020-2024
5,064
±674 (90% margin)
2020 Census count: 5,265
Median household income
$243,370
±$10,398 (90% margin)
Alameda County: $129,367
Median home value
$1,837,600
±$154,227 (90% margin)
Alameda County: $1,090,100
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
Alameda County: $2,357
Where is Census Tract 4421?
Census Tract 4421 is one of 379 census tracts in Alameda County, California. It covers 0.72 square miles of land, 7,333 residents per square mile in 2020. Its GEOID, 06001442100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Fremont | 100% |
4 census tracts border Census Tract 4421: Tract 4419.28 ($167,083), Tract 4420 ($227,011), Tract 4422 ($250,000 or more) and Tract 4423.02 ($119,745). 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 4421?
The 2020-2024 American Community Survey puts Census Tract 4421's population at 5,064 (±674) in 1,676 households; the 2020 Census counted 5,265 residents and 1,700 housing units.
| Measure | Tract 4421 | Fremont |
|---|---|---|
| Total population | 5,064±674 | 228,295 |
| Households | 1,676±172 | 78,054 |
| Average household size | 3.02±0.22 | 2.90 |
| Housing units | 1,706±182 | 81,579 |
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 4421?
The median resident of Census Tract 4421 is 44.8 years old; 22.1% are under 18 and 18.3% are 65 or older. The largest group is non-Hispanic Asian residents at 86.2%, then non-Hispanic white residents at 7.4%. 61.2% of residents were born outside the United States.
| Measure | Tract 4421 | Fremont |
|---|---|---|
| Median age | 44.8±4.1 | 39.1 |
| Under 18 years | 22.1%±4.9 pts | 22.3% |
| 65 years and over | 18.3%±3.9 pts | 14.0% |
| Hispanic or Latino (any race) | 2.6%±2.4 pts | 13.1% |
| White alone, not Hispanic | 7.4%±2.1 pts | 15.7% |
| Black or African American alone, not Hispanic | 1.1%±0.9 pts | 2.8% |
| Asian alone, not Hispanic | 86.2%±3.6 pts | 63.7% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±0.8 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±0.8 pts | 0.4% |
| Two or more races, not Hispanic | 2.4%±1.6 pts | 3.7% |
| Some other race alone, not Hispanic | 0.2%±0.3 pts | 0.4% |
| Born outside the United States | 61.2%±3.9 pts | 51.1% |
| Speak a language other than English at home (age 5+) | 79.2%±4.9 pts | 64.2% |
| Civilian veterans (age 18+) | 1.7%±0.9 pts | 2.0% |
| With a disability | 5.1%±1.8 pts | 6.9% |
| No health insurance coverage | 2.5%±1.8 pts | 2.6% |
| High school graduate or higher (age 25+) | 97.6%±1.4 pts | 93.0% |
| Bachelor's degree or higher (age 25+) | 80.0%±5.5 pts | 63.9% |
| Graduate or professional degree (age 25+) | 52.2%±5.8 pts | 31.4% |
| Lived in the same house a year earlier | 95.1%±2.5 pts | 88.2% |
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 4421 earn?
Half of the 1,676 households in Census Tract 4421 earn less than $243,370 a year (±$10,398), against $129,367 across Alameda County: 26th highest of the county's 372 tracts with a reliable estimate.
| Measure | Tract 4421 | Fremont |
|---|---|---|
| Median household income | $243,370±$10,398 | $181,506 |
| Mean household income | $300,360±$38,469 | $221,930 |
| Per capita income | $99,820±$11,591 | $77,049 |
| People below the poverty line | 0.2%±0.3 pts | 5.2% |
| Children under 18 below the poverty line | 0.0%±3.8 pts | 4.5% |
| Households receiving SNAP | 4.0%±3.1 pts | 4.2% |
| Households with a computer | 99.6%±0.6 pts | 99.0% |
| Households with a broadband subscription | 95.3%±4.9 pts | 96.8% |
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 4421?
Owners occupy 80.1% of Census Tract 4421's occupied homes and renters 19.9%. The median owner-occupied home is valued at $1,837,600 by its owner (±$154,227). The median renter pays $3,500 or more a month including utilities, and 36.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 4421 | Fremont |
|---|---|---|
| Median home value (owner-occupied) | $1,837,600±$154,227 | $1,403,800 |
| Median gross rent | $3,500 or more | $2,933 |
| Renters paying 35% or more of income on rent | 36.3%±22.4 pts | 35.6% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 80.1%±8.9 pts | 60.8% |
| Renter-occupied homes | 19.9%±8.9 pts | 39.2% |
| Housing units | 1,706±182 | 81,579 |
| Single-family detached homes | 80.1%±6.0 pts | 56.3% |
| Mobile homes | 0.0%±2.5 pts | 0.9% |
| Built 2020 or later | 1.8%±2.6 pts | 2.7% |
| Built 2010 to 2019 | 2.5%±1.8 pts | 6.2% |
| Built 1939 or earlier | 1.5%±1.3 pts | 1.2% |
| Households with no vehicle | 0.6%±0.9 pts | 4.7% |
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 4421 get to work?
48.5% of Census Tract 4421's workers drive alone and 40.0% work from home. The average trip to work takes 34.0 minutes.
| Measure | Tract 4421 | Fremont |
|---|---|---|
| In the labor force (age 16+) | 61.4%±4.2 pts | 67.9% |
| Unemployment rate | 2.7%±1.8 pts | 4.7% |
| Drove alone to work | 48.5%±8.5 pts | 53.8% |
| Carpooled | 6.4%±3.0 pts | 7.3% |
| Public transportation | 3.2%±2.0 pts | 3.8% |
| Walked | 0.0%±1.7 pts | 1.2% |
| Worked from home | 40.0%±9.8 pts | 32.1% |
| Mean travel time to work | 34.0 min±2.9 | 30.3 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 4421 compare with the other tracts in Alameda County?
Among Alameda County's tracts with a reliable estimate, Census Tract 4421 ranks as shown below (1 = highest).
| Measure | In Alameda County | In Fremont |
|---|---|---|
| Population | 119th of 375 | 18th of 47 |
| Residents per square mile | 252nd of 378 | 30th of 48 |
| Median household income | 26th of 372 | 9th of 47 |
| Per capita income | 41st of 377 | 8th of 47 |
| Median home value | 20th of 366 | 8th of 47 |
| Median gross rent | 1st of 368 | 1st of 45 |
| Bachelor's degree or higher | 47th of 376 | 9th of 47 |
| Median age | 78th of 377 | 8th of 47 |
| Owner-occupied share | 82nd of 366 | 12th of 47 |
The tracts next to it on Alameda County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4431.02 | 23rd | $249,375±$23,454 · within the margin of this tract |
| Tract 4431.05 | 24th | $248,185±$26,790 · within the margin of this tract |
| Tract 4443.04 | 25th | $248,029±$29,887 · within the margin of this tract |
| Tract 4421 | 26th | $243,370±$10,398 |
| Tract 4515.05 | 27th | $239,318±$40,959 · within the margin of this tract |
| Tract 4501.02 | 28th | $239,250±$58,812 · within the margin of this tract |
| Tract 4506.06 | 29th | $238,723±$33,269 · 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 4421?
3 of the 18 figures for Census Tract 4421 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