Census tract · Marin County
Census Tract 1121, Marin County, California
Census Tract 1121, GEOID 06041112100, in Marin County, California, mostly within San Rafael (85% of its census blocks). 4,397 residents in the ACS 2020-2024 5-year estimates (±579); the 2020 Census counted 4,611.
Residents, 2020-2024
4,397
±579 (90% margin)
2020 Census count: 4,611
Median household income
$99,450
±$23,346 (90% margin)
Marin County: $149,091
Median home value
$1,233,000
±$103,179 (90% margin)
Marin County: $1,507,300
Median gross rent
$2,392
±$370 (90% margin)
Marin County: $2,668
Where is Census Tract 1121?
Census Tract 1121 is one of 63 census tracts in Marin County, California. It covers 1.14 square miles of land, 4,055 residents per square mile in 2020. Its GEOID, 06041112100, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| San Rafael | 85% |
5 census tracts border Census Tract 1121: Tract 1101 ($104,066), Tract 1110.01 ($85,972), Tract 1110.02 ($93,756), Tract 1122.02 ($110,515) and Tract 1192.02 ($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 1121?
The 2020-2024 American Community Survey puts Census Tract 1121's population at 4,397 (±579) in 1,911 households; the 2020 Census counted 4,611 residents and 1,954 housing units.
| Measure | Tract 1121 | San Rafael |
|---|---|---|
| Total population | 4,397 ±579 | 60,433 |
| Households | 1,911 ±199 | 22,910 |
| Average household size | 2.29 ±0.23 | 2.54 |
| Housing units | 1,947 ±183 | 23,909 |
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 1121?
The median resident of Census Tract 1121 is 39.9 years old; 20.6% are under 18 and 16.3% are 65 or older. The largest group is non-Hispanic white residents at 58.7%, then Hispanic or Latino residents (of any race) at 33.1%. 20.9% of residents were born outside the United States.
| Measure | Tract 1121 | San Rafael |
|---|---|---|
| Median age | 39.9 ±4.4 | 43.2 |
| Under 18 years | 20.6% ±5.0 pts | 19.7% |
| 65 years and over | 16.3% ±5.4 pts | 20.4% |
| Hispanic or Latino (any race) | 33.1% ±9.2 pts | 35.5% |
| White alone, not Hispanic | 58.7% ±8.8 pts | 51.2% |
| Black or African American alone, not Hispanic | 0.0% ±1.0 pts | 2.2% |
| Asian alone, not Hispanic | 4.5% ±2.7 pts | 4.9% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.0 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.0 pts | 0.3% |
| Two or more races, not Hispanic | 3.5% ±2.1 pts | 4.6% |
| Some other race alone, not Hispanic | 0.2% ±0.3 pts | 1.2% |
| Born outside the United States | 20.9% ±5.0 pts | 28.3% |
| Speak a language other than English at home (age 5+) | 38.9% ±9.1 pts | 38.1% |
| Civilian veterans (age 18+) | 2.3% ±1.7 pts | 3.1% |
| With a disability | 9.2% ±3.3 pts | 10.2% |
| No health insurance coverage | 7.8% ±3.0 pts | 6.7% |
| High school graduate or higher (age 25+) | 86.3% ±5.9 pts | 84.8% |
| Bachelor's degree or higher (age 25+) | 49.5% ±7.7 pts | 49.7% |
| Graduate or professional degree (age 25+) | 23.6% ±7.0 pts | 21.8% |
| Lived in the same house a year earlier | 92.4% ±4.0 pts | 89.2% |
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 1121 earn?
Half of the 1,911 households in Census Tract 1121 earn less than $99,450 a year (±$23,346), against $149,091 across Marin County: 49th highest of the county's 61 tracts with a reliable estimate. 21.7% of residents live below the poverty line.
| Measure | Tract 1121 | San Rafael |
|---|---|---|
| Median household income | $99,450 ±$23,346 | $119,435 |
| Mean household income | $187,628 ±$54,243 | $183,386 |
| Per capita income | $79,781 ±$22,487 | $70,031 |
| People below the poverty line | 21.7% ±9.9 pts | 11.7% |
| Children under 18 below the poverty line | 37.6% ±22.8 pts | 18.6% |
| Households receiving SNAP | 3.6% ±2.5 pts | 8.1% |
| Households with a computer | 96.7% ±3.5 pts | 97.1% |
| Households with a broadband subscription | 94.9% ±3.7 pts | 94.6% |
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 1121?
Owners occupy 47.1% of Census Tract 1121's occupied homes and renters 52.9%. The median owner-occupied home is valued at $1,233,000 by its owner (±$103,179). The median renter pays $2,392 a month including utilities, and 56.7% of renters pay 35% or more of their income on rent.
| Measure | Tract 1121 | San Rafael |
|---|---|---|
| Median home value (owner-occupied) | $1,233,000 ±$103,179 | $1,355,600 |
| Median gross rent | $2,392 ±$370 | $2,377 |
| Renters paying 35% or more of income on rent | 56.7% ±12.0 pts | 51.4% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 47.1% ±9.6 pts | 53.0% |
| Renter-occupied homes | 52.9% ±9.6 pts | 47.0% |
| Housing units | 1,947 ±183 | 23,909 |
| Single-family detached homes | 53.9% ±9.6 pts | 47.6% |
| Mobile homes | 1.1% ±1.2 pts | 1.4% |
| Built 2020 or later | 0.0% ±2.2 pts | 0.3% |
| Built 2010 to 2019 | 0.6% ±1.0 pts | 2.0% |
| Built 1939 or earlier | 19.8% ±7.4 pts | 9.8% |
| Households with no vehicle | 5.2% ±4.7 pts | 8.7% |
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 1121 get to work?
49.7% of Census Tract 1121's workers drive alone and 33.4% work from home. The average trip to work takes 22.6 minutes. The unemployment rate in 2020-2024 averaged 6.8%.
| Measure | Tract 1121 | San Rafael |
|---|---|---|
| In the labor force (age 16+) | 73.1% ±5.6 pts | 64.3% |
| Unemployment rate | 6.8% ±3.1 pts | 5.4% |
| Drove alone to work | 49.7% ±7.4 pts | 48.3% |
| Carpooled | 5.9% ±4.7 pts | 12.8% |
| Public transportation | 4.0% ±4.4 pts | 5.6% |
| Walked | 6.1% ±4.4 pts | 4.5% |
| Worked from home | 33.4% ±8.4 pts | 26.3% |
| Mean travel time to work | 22.6 min ±2.6 | 25.3 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 1121 compare with the other tracts in Marin County?
Among Marin County's tracts with a reliable estimate, Census Tract 1121 ranks as shown below (1 = highest).
| Measure | In Marin County | In San Rafael |
|---|---|---|
| Population | 32nd of 62 | 9th of 14 |
| Residents per square mile | 25th of 62 | 8th of 14 |
| Median household income | 49th of 61 | 9th of 14 |
| Per capita income | 41st of 62 | 6th of 14 |
| Median home value | 39th of 61 | 9th of 14 |
| Median gross rent | 40th of 58 | 4th of 12 |
| Poverty rate | 2nd of 37 | 2nd of 9 |
| Bachelor's degree or higher | 47th of 60 | 7th of 13 |
| Median age | 58th of 62 | 11th of 14 |
| Owner-occupied share | 48th of 58 | 7th of 11 |
The tracts next to it on Marin County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 1022.02 | 46th | $104,432±$27,566 · within the margin of this tract |
| Tract 1101 | 47th | $104,066±$37,551 · within the margin of this tract |
| Tract 1321 | 48th | $101,736±$50,129 · within the margin of this tract |
| Tract 1121 | 49th | $99,450±$23,346 |
| Tract 1050.01 | 50th | $98,375±$44,270 · within the margin of this tract |
| Tract 1110.02 | 51st | $93,756±$6,291 · within the margin of this tract |
| Tract 1032 | 52nd | $93,173±$49,112 · 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 1121?
1 of the 18 figures for Census Tract 1121 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