Census tract · Alameda County
Census Tract 4431.03, Alameda County, California
Census Tract 4431.03, GEOID 06001443103, in Alameda County, California, entirely within Fremont. 4,002 residents in the ACS 2020-2024 5-year estimates (±671); the 2020 Census counted 3,972.
Residents, 2020-2024
4,002
±671 (90% margin)
2020 Census count: 3,972
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
Alameda County: $129,367
Median home value
$2,000,000 or more
The survey's top or bottom value; no margin is published
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 4431.03?
Census Tract 4431.03 is one of 379 census tracts in Alameda County, California. It covers 6.44 square miles of land, 616 residents per square mile in 2020. Its GEOID, 06001443103, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Fremont | 100% |
6 census tracts border Census Tract 4431.03: Tract 4420 ($227,011), Tract 4431.02 ($249,375), Tract 4431.04 ($210,369), Tract 4431.05 ($248,185), Tract 4432 ($250,000 or more) and Tract 4507.01 ($250,000 or more). 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 4431.03?
The 2020-2024 American Community Survey puts Census Tract 4431.03's population at 4,002 (±671) in 1,249 households; the 2020 Census counted 3,972 residents and 1,235 housing units.
| Measure | Tract 4431.03 | Fremont |
|---|---|---|
| Total population | 4,002±671 | 228,295 |
| Households | 1,249±163 | 78,054 |
| Average household size | 3.12±0.24 | 2.90 |
| Housing units | 1,271±168 | 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 4431.03?
The median resident of Census Tract 4431.03 is 51.3 years old; 14.4% are under 18 and 26.4% are 65 or older. The largest group is non-Hispanic Asian residents at 78.7%, then non-Hispanic white residents at 14.6%. 56.1% of residents were born outside the United States.
| Measure | Tract 4431.03 | Fremont |
|---|---|---|
| Median age | 51.3±1.9 | 39.1 |
| Under 18 years | 14.4%±3.2 pts | 22.3% |
| 65 years and over | 26.4%±3.8 pts | 14.0% |
| Hispanic or Latino (any race) | 0.6%±0.7 pts | 13.1% |
| White alone, not Hispanic | 14.6%±11.6 pts | 15.7% |
| Black or African American alone, not Hispanic | 3.2%±4.3 pts | 2.8% |
| Asian alone, not Hispanic | 78.7%±11.2 pts | 63.7% |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±1.1 pts | 0.2% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±1.1 pts | 0.4% |
| Two or more races, not Hispanic | 2.9%±3.3 pts | 3.7% |
| Some other race alone, not Hispanic | 0.0%±1.1 pts | 0.4% |
| Born outside the United States | 56.1%±5.2 pts | 51.1% |
| Speak a language other than English at home (age 5+) | 74.4%±8.2 pts | 64.2% |
| Civilian veterans (age 18+) | 0.4%±0.7 pts | 2.0% |
| With a disability | 6.8%±2.6 pts | 6.9% |
| No health insurance coverage | 0.4%±0.3 pts | 2.6% |
| High school graduate or higher (age 25+) | 99.4%±0.8 pts | 93.0% |
| Bachelor's degree or higher (age 25+) | 86.6%±6.0 pts | 63.9% |
| Graduate or professional degree (age 25+) | 44.8%±8.9 pts | 31.4% |
| Lived in the same house a year earlier | 96.9%±1.9 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 4431.03 earn?
Half of the 1,249 households in Census Tract 4431.03 earn less than $250,000 or more a year (), against $129,367 across Alameda County: 1st highest of the county's 372 tracts with a reliable estimate.
| Measure | Tract 4431.03 | Fremont |
|---|---|---|
| Median household income | $250,000 or more | $181,506 |
| Mean household income | $396,355±$63,218 | $221,930 |
| Per capita income | $125,021±$19,898 | $77,049 |
| People below the poverty line | 4.2%±3.4 pts | 5.2% |
| Children under 18 below the poverty line | 2.9%±4.5 pts | 4.5% |
| Households receiving SNAP | 3.2%±3.7 pts | 4.2% |
| Households with a computer | 99.3%±1.2 pts | 99.0% |
| Households with a broadband subscription | 99.0%±1.2 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 4431.03?
Owners occupy 94.0% of Census Tract 4431.03's occupied homes and renters 6.0%. The median owner-occupied home is valued at $2,000,000 or more by its owner (). The median renter pays $3,500 or more a month including utilities.
| Measure | Tract 4431.03 | Fremont |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $1,403,800 |
| Median gross rent | $3,500 or more | $2,933 |
| Renters paying 35% or more of income on rent | 11.9%±20.6 pts | 35.6% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 94.0%±4.0 pts | 60.8% |
| Renter-occupied homes | 6.0%±4.0 pts | 39.2% |
| Housing units | 1,271±168 | 81,579 |
| Single-family detached homes | 85.2%±9.0 pts | 56.3% |
| Mobile homes | 0.0%±3.3 pts | 0.9% |
| Built 2020 or later | 0.0%±3.3 pts | 2.7% |
| Built 2010 to 2019 | 7.2%±4.0 pts | 6.2% |
| Built 1939 or earlier | 1.0%±1.7 pts | 1.2% |
| Households with no vehicle | 3.4%±2.8 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 4431.03 get to work?
47.2% of Census Tract 4431.03's workers drive alone and 43.9% work from home. The average trip to work takes 30.9 minutes. The unemployment rate in 2020-2024 averaged 6.1%.
| Measure | Tract 4431.03 | Fremont |
|---|---|---|
| In the labor force (age 16+) | 67.2%±7.9 pts | 67.9% |
| Unemployment rate | 6.1%±2.8 pts | 4.7% |
| Drove alone to work | 47.2%±7.3 pts | 53.8% |
| Carpooled | 6.3%±4.2 pts | 7.3% |
| Public transportation | 1.8%±3.1 pts | 3.8% |
| Walked | 0.7%±1.8 pts | 1.2% |
| Worked from home | 43.9%±7.9 pts | 32.1% |
| Mean travel time to work | 30.9 min±3.6 | 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 4431.03 compare with the other tracts in Alameda County?
Among Alameda County's tracts with a reliable estimate, Census Tract 4431.03 ranks as shown below (1 = highest).
| Measure | In Alameda County | In Fremont |
|---|---|---|
| Population | 206th of 375 | 31st of 47 |
| Residents per square mile | 365th of 378 | 46th of 48 |
| Median household income | 1st of 372 | 1st of 47 |
| Per capita income | 13th of 377 | 2nd of 47 |
| Median home value | 1st of 366 | 1st of 47 |
| Median gross rent | 1st of 368 | 1st of 45 |
| Bachelor's degree or higher | 12th of 376 | 1st of 47 |
| Median age | 10th of 377 | 1st of 47 |
| Owner-occupied share | 9th of 366 | 2nd of 47 |
The tracts next to it on Alameda County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 4001 | 1st | $250,000 or more |
| Tract 4042 | 1st | $250,000 or more |
| Tract 4045.01 | 1st | $250,000 or more |
| Tract 4045.02 | 1st | $250,000 or more |
| Tract 4047 | 1st | $250,000 or more |
| Tract 4051 | 1st | $250,000 or more |
| Tract 4211 | 1st | $250,000 or more |
| Tract 4212 | 1st | $250,000 or more |
| Tract 4261 | 1st | $250,000 or more |
| Tract 4262 | 1st | $250,000 or more |
| Tract 4403.37 | 1st | $250,000 or more |
| Tract 4415.03 | 1st | $250,000 or more |
| Tract 4415.24 | 1st | $250,000 or more |
| Tract 4422 | 1st | $250,000 or more |
| Tract 4431.03 | 1st | $250,000 or more |
| Tract 4432 | 1st | $250,000 or more |
| Tract 4433.01 | 1st | $250,000 or more |
| Tract 4507.01 | 1st | $250,000 or more |
| Tract 4507.51 | 1st | $250,000 or more |
| Tract 4507.52 | 1st | $250,000 or more |
| Tract 4511.02 | 1st | $250,000 or more |
| Tract 4511.03 | 1st | $250,000 or more |
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 4431.03?
4 of the 18 figures for Census Tract 4431.03 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