Census tract · Marin County
Census Tract 1230, Marin County, California
Census Tract 1230, GEOID 06041123000, in Marin County, California, mostly within Belvedere (96% of its census blocks). 2,354 residents in the ACS 2020-2024 5-year estimates (±326); the 2020 Census counted 2,131.
Residents, 2020-2024
2,354
±326 (90% margin)
2020 Census count: 2,131
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
Marin County: $149,091
Median home value
$2,000,000 or more
The survey's top or bottom value; no margin is published
Marin County: $1,507,300
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
Marin County: $2,668
Where is Census Tract 1230?
Census Tract 1230 is one of 63 census tracts in Marin County, California. It covers 0.52 square miles of land, 4,098 residents per square mile in 2020. Its GEOID, 06041123000, names it uniquely (how tract numbers and GEOIDs work).
1 census tract borders Census Tract 1230: Tract 1242 ($235,161). 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 1230?
The 2020-2024 American Community Survey puts Census Tract 1230's population at 2,354 (±326) in 891 households; the 2020 Census counted 2,131 residents and 1,063 housing units.
| Measure | Tract 1230 | Belvedere |
|---|---|---|
| Total population | 2,354 ±326 | 2,345 |
| Households | 891 ±103 | 886 |
| Average household size | 2.64 ±0.23 | 2.65 |
| Housing units | 1,086 ±78 | 1,081 |
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 1230?
The median resident of Census Tract 1230 is 48.9 years old; 24.4% are under 18 and 24.9% are 65 or older. The largest group is non-Hispanic white residents at 85.1%, then Hispanic or Latino residents (of any race) at 5.8%. 15.5% of residents were born outside the United States.
| Measure | Tract 1230 | Belvedere |
|---|---|---|
| Median age | 48.9 ±5.7 | 49.0 |
| Under 18 years | 24.4% ±4.4 pts | 24.5% |
| 65 years and over | 24.9% ±4.7 pts | 24.9% |
| Hispanic or Latino (any race) | 5.8% ±3.8 pts | 5.8% |
| White alone, not Hispanic | 85.1% ±5.4 pts | 85.1% |
| Black or African American alone, not Hispanic | 0.6% ±0.7 pts | 0.6% |
| Asian alone, not Hispanic | 5.6% ±3.5 pts | 5.6% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.8 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.8 pts | 0.0% |
| Two or more races, not Hispanic | 2.5% ±2.0 pts | 2.5% |
| Some other race alone, not Hispanic | 0.4% ±0.6 pts | 0.4% |
| Born outside the United States | 15.5% ±4.9 pts | 15.6% |
| Speak a language other than English at home (age 5+) | 11.0% ±4.5 pts | 11.1% |
| Civilian veterans (age 18+) | 3.3% ±2.1 pts | 3.3% |
| With a disability | 8.4% ±3.0 pts | 8.4% |
| No health insurance coverage | 0.6% ±0.6 pts | 0.6% |
| High school graduate or higher (age 25+) | 99.3% ±0.8 pts | 99.3% |
| Bachelor's degree or higher (age 25+) | 87.4% ±3.3 pts | 87.4% |
| Graduate or professional degree (age 25+) | 45.3% ±6.0 pts | 45.3% |
| Lived in the same house a year earlier | 82.9% ±6.1 pts | 82.8% |
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 1230 earn?
Half of the 891 households in Census Tract 1230 earn less than $250,000 or more a year (), against $149,091 across Marin County: 1st highest of the county's 61 tracts with a reliable estimate. 5.9% of residents live below the poverty line.
| Measure | Tract 1230 | Belvedere |
|---|---|---|
| Median household income | $250,000 or more | $250,000 or more |
| Mean household income | $475,179 ±$78,031 | $476,762 |
| Per capita income | $183,563 ±$31,203 | $183,909 |
| People below the poverty line | 5.9% ±3.5 pts | 5.9% |
| Children under 18 below the poverty line | 0.9% ±1.4 pts | 0.9% |
| Households receiving SNAP | 0.0% ±4.7 pts | 0.0% |
| Households with a computer | 100.0% ±4.7 pts | 100.0% |
| Households with a broadband subscription | 98.0% ±1.9 pts | 98.0% |
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 1230?
Owners occupy 68.1% of Census Tract 1230's occupied homes and renters 31.9%. 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, and 61.3% of renters pay 35% or more of their income on rent.
| Measure | Tract 1230 | Belvedere |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $2,000,000 or more |
| Median gross rent | $3,500 or more | $3,500 or more |
| Renters paying 35% or more of income on rent | 61.3% ±14.0 pts | 61.3% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 68.1% ±7.5 pts | 67.9% |
| Renter-occupied homes | 31.9% ±7.5 pts | 32.1% |
| Housing units | 1,086 ±78 | 1,081 |
| Single-family detached homes | 86.1% ±4.6 pts | 86.0% |
| Mobile homes | 0.0% ±3.8 pts | 0.0% |
| Built 2020 or later | 0.0% ±3.8 pts | 0.0% |
| Built 2010 to 2019 | 1.7% ±2.0 pts | 1.7% |
| Built 1939 or earlier | 16.9% ±6.2 pts | 16.9% |
| Households with no vehicle | 3.1% ±2.2 pts | 3.2% |
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 1230 get to work?
30.0% of Census Tract 1230's workers drive alone and 59.4% work from home. The average trip to work takes 31.3 minutes.
| Measure | Tract 1230 | Belvedere |
|---|---|---|
| In the labor force (age 16+) | 56.9% ±5.3 pts | 56.7% |
| Unemployment rate | 2.2% ±2.2 pts | 2.2% |
| Drove alone to work | 30.0% ±7.8 pts | 29.9% |
| Carpooled | 0.0% ±4.3 pts | 0.0% |
| Public transportation | 3.8% ±2.1 pts | 3.9% |
| Walked | 4.1% ±2.8 pts | 4.2% |
| Worked from home | 59.4% ±8.4 pts | 59.4% |
| Mean travel time to work | 31.3 min ±4.1 | 31.4 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 1230 compare with the other tracts in Marin County?
Among Marin County's tracts with a reliable estimate, Census Tract 1230 ranks as shown below (1 = highest).
| Measure | In Marin County |
|---|---|
| Population | 52nd of 62 |
| Residents per square mile | 24th of 62 |
| Median household income | 1st of 61 |
| Per capita income | 1st of 62 |
| Median home value | 1st of 61 |
| Median gross rent | 1st of 58 |
| Poverty rate | 27th of 37 |
| Bachelor's degree or higher | 1st of 60 |
| Median age | 29th of 62 |
| Owner-occupied share | 28th of 58 |
The tracts next to it on Marin County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 1181 | 1st | $250,000 or more |
| Tract 1192.02 | 1st | $250,000 or more |
| Tract 1230 | 1st | $250,000 or more |
| Tract 1282 | 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 1230?
1 of the 18 figures for Census Tract 1230 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