Census tract · Marin County
Census Tract 1261, Marin County, California
Census Tract 1261, GEOID 06041126100, in Marin County, California, mostly within Mill Valley (95% of its census blocks). 6,171 residents in the ACS 2020-2024 5-year estimates (±389); the 2020 Census counted 5,955.
Residents, 2020-2024
6,171
±389 (90% margin)
2020 Census count: 5,955
Median household income
$227,566
±$41,189 (90% margin)
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 1261?
Census Tract 1261 is one of 63 census tracts in Marin County, California. It covers 2.05 square miles of land, 2,911 residents per square mile in 2020. Its GEOID, 06041126100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Mill Valley | 95% |
| Larkspur | 2% |
| Tamalpais-Homestead Valley | 2% |
7 census tracts border Census Tract 1261: Tract 1191 ($244,702), Tract 1200.02 ($235,313), Tract 1211 ($215,798), Tract 1262 ($147,089), Tract 1270 ($200,978), Tract 1282 ($250,000 or more) and Tract 1311 ($185,104). 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 1261?
The 2020-2024 American Community Survey puts Census Tract 1261's population at 6,171 (±389) in 2,385 households; the 2020 Census counted 5,955 residents and 2,529 housing units.
| Measure | Tract 1261 | Mill Valley |
|---|---|---|
| Total population | 6,171 ±389 | 14,012 |
| Households | 2,385 ±190 | 5,688 |
| Average household size | 2.59 ±0.16 | 2.45 |
| Housing units | 2,632 ±242 | 6,418 |
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 1261?
The median resident of Census Tract 1261 is 45.2 years old; 24.2% are under 18 and 17.3% are 65 or older. The largest group is non-Hispanic white residents at 87.5%, then Hispanic or Latino residents (of any race) at 4.3%. 15.1% of residents were born outside the United States.
| Measure | Tract 1261 | Mill Valley |
|---|---|---|
| Median age | 45.2 ±2.2 | 48.7 |
| Under 18 years | 24.2% ±3.1 pts | 18.6% |
| 65 years and over | 17.3% ±2.7 pts | 23.5% |
| Hispanic or Latino (any race) | 4.3% ±2.3 pts | 4.8% |
| White alone, not Hispanic | 87.5% ±3.5 pts | 80.1% |
| Black or African American alone, not Hispanic | 0.0% ±0.7 pts | 0.7% |
| Asian alone, not Hispanic | 3.3% ±2.0 pts | 8.3% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.0% |
| Two or more races, not Hispanic | 4.1% ±2.2 pts | 4.9% |
| Some other race alone, not Hispanic | 0.7% ±1.2 pts | 1.2% |
| Born outside the United States | 15.1% ±5.7 pts | 18.6% |
| Speak a language other than English at home (age 5+) | 13.7% ±6.6 pts | 15.9% |
| Civilian veterans (age 18+) | 2.4% ±1.4 pts | 2.8% |
| With a disability | 6.1% ±2.1 pts | 8.1% |
| No health insurance coverage | 2.8% ±1.4 pts | 3.7% |
| High school graduate or higher (age 25+) | 99.2% ±1.0 pts | 98.7% |
| Bachelor's degree or higher (age 25+) | 80.7% ±4.8 pts | 75.8% |
| Graduate or professional degree (age 25+) | 34.3% ±5.5 pts | 35.9% |
| Lived in the same house a year earlier | 88.2% ±4.4 pts | 87.9% |
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 1261 earn?
Half of the 2,385 households in Census Tract 1261 earn less than $227,566 a year (±$41,189), against $149,091 across Marin County: 10th highest of the county's 61 tracts with a reliable estimate. 3.7% of residents live below the poverty line.
| Measure | Tract 1261 | Mill Valley |
|---|---|---|
| Median household income | $227,566 ±$41,189 | $206,212 |
| Mean household income | $324,673 ±$37,356 | $294,061 |
| Per capita income | $122,062 ±$13,063 | $118,725 |
| People below the poverty line | 3.7% ±2.4 pts | 5.9% |
| Children under 18 below the poverty line | 2.5% ±2.7 pts | 4.3% |
| Households receiving SNAP | 1.9% ±1.7 pts | 2.6% |
| Households with a computer | 100.0% ±1.8 pts | 99.6% |
| Households with a broadband subscription | 98.8% ±1.4 pts | 96.6% |
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 1261?
Owners occupy 68.4% of Census Tract 1261's occupied homes and renters 31.6%. 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 1261 | Mill Valley |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $2,000,000 or more |
| Median gross rent | $3,500 or more | $3,278 |
| Renters paying 35% or more of income on rent | 21.9% ±15.1 pts | 27.2% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 68.4% ±7.9 pts | 66.2% |
| Renter-occupied homes | 31.6% ±7.9 pts | 33.8% |
| Housing units | 2,632 ±242 | 6,418 |
| Single-family detached homes | 82.8% ±6.1 pts | 69.7% |
| Mobile homes | 0.0% ±1.6 pts | 0.0% |
| Built 2020 or later | 0.7% ±1.2 pts | 0.5% |
| Built 2010 to 2019 | 10.1% ±5.7 pts | 6.0% |
| Built 1939 or earlier | 32.9% ±8.0 pts | 28.2% |
| Households with no vehicle | 0.0% ±1.8 pts | 3.5% |
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 1261 get to work?
45.3% of Census Tract 1261's workers drive alone and 40.2% work from home. The average trip to work takes 22.5 minutes. The unemployment rate in 2020-2024 averaged 8.1%.
| Measure | Tract 1261 | Mill Valley |
|---|---|---|
| In the labor force (age 16+) | 65.9% ±4.8 pts | 60.7% |
| Unemployment rate | 8.1% ±4.4 pts | 8.8% |
| Drove alone to work | 45.3% ±9.3 pts | 48.7% |
| Carpooled | 4.4% ±3.3 pts | 3.6% |
| Public transportation | 1.0% ±1.1 pts | 1.6% |
| Walked | 8.1% ±3.7 pts | 5.0% |
| Worked from home | 40.2% ±9.4 pts | 40.0% |
| Mean travel time to work | 22.5 min ±2.9 | 24.8 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 1261 compare with the other tracts in Marin County?
Among Marin County's tracts with a reliable estimate, Census Tract 1261 ranks as shown below (1 = highest).
| Measure | In Marin County | In Mill Valley |
|---|---|---|
| Population | 9th of 62 | 1st of 3 |
| Residents per square mile | 32nd of 62 | 2nd of 3 |
| Median household income | 10th of 61 | 1st of 3 |
| Per capita income | 14th of 62 | 2nd of 3 |
| Median home value | 1st of 61 | 1st of 3 |
| Median gross rent | 1st of 58 | 1st of 3 |
| Poverty rate | 34th of 37 | 3rd of 3 |
| Bachelor's degree or higher | 6th of 60 | 1st of 3 |
| Median age | 45th of 62 | 3rd of 3 |
| Owner-occupied share | 26th of 58 | 1st of 3 |
The tracts next to it on Marin County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 1200.02 | 7th | $235,313±$67,749 · within the margin of this tract |
| Tract 1242 | 8th | $235,161±$76,527 · within the margin of this tract |
| Tract 1281 | 9th | $229,813±$29,422 · within the margin of this tract |
| Tract 1261 | 10th | $227,566±$41,189 |
| Tract 1212 | 11th | $216,731±$35,968 · within the margin of this tract |
| Tract 1211 | 12th | $215,798±$61,946 · within the margin of this tract |
| Tract 1011 | 13th | $208,958±$86,879 · 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 1261?
1 of the 18 figures for Census Tract 1261 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