Census-designated place · California
Lucas Valley-Marinwood, California
Lucas Valley-Marinwood, census-designated place, in Marin County, California. Lucas Valley-Marinwood had 6,473 people in the ACS 2020-2024 5-year estimates (±654). GEOID 0644399.
Residents, 2020-2024
6,473
±654 (90% margin)
2020 Census count: 6,259
Median household income
$200,761
±$42,266 (90% margin)
California: $99,122
Median home value
$1,445,600
±$115,433 (90% margin)
California: $734,700
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
California: $2,036
Where is Lucas Valley-Marinwood and what county is it in?
Lucas Valley-Marinwood is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Marin County, California. It covers 5.7 square miles of land, 1,092 residents per square mile in 2020.
Lucas Valley-Marinwood is in the San Francisco-Oakland-Fremont, CA metropolitan statistical area, which takes in 5 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Lucas Valley-Marinwood, and is it growing?
The 2020-2024 American Community Survey puts Lucas Valley-Marinwood's population at 6,473 (±654). The 2020 Census counted 6,259 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; Lucas Valley-Marinwood is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Lucas Valley-Marinwood | Marin County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 6,473 ±654 | 257,969 | no clear change |
| Households | 2,472 ±239 | 103,018 | no clear change |
| Average household size | 2.56 ±0.19 | 2.44 | no clear change |
| Housing units | 2,592 ±224 | 112,116 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Lucas Valley-Marinwood?
The median resident of Lucas Valley-Marinwood is 49.8 years old; 18.4% are under 18 and 27.2% are 65 or older. The largest group is non-Hispanic white residents at 79.3%, then Hispanic or Latino residents (of any race) at 8.5%. 13.7% of residents were born outside the United States.
| Measure | Lucas Valley-Marinwood | Marin County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 49.8 ±2.5 | 47.4 | no clear change |
| Under 18 years | 18.4% ±4.3 pts | 19.4% | – |
| 65 years and over | 27.2% ±4.3 pts | 23.8% | – |
| Male | 38.6% ±4.1 pts | 49.2% | – |
| Hispanic or Latino (any race) | 8.5% ±2.5 pts | 19.5% | no clear change |
| White alone, not Hispanic | 79.3% ±4.2 pts | 65.1% | no clear change |
| Black or African American alone, not Hispanic | 0.9% ±1.5 pts | 2.1% | – |
| Asian alone, not Hispanic | 7.3% ±2.9 pts | 6.1% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.7 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.7 pts | 0.2% | – |
| Two or more races, not Hispanic | 4.0% ±2.2 pts | 5.9% | – |
| Some other race alone, not Hispanic | 0.0% ±0.7 pts | 1.2% | – |
| Born outside the United States | 13.7% ±4.1 pts | 19.6% | no clear change |
| Speak a language other than English at home (age 5+) | 13.5% ±4.1 pts | 23.9% | – |
| Civilian veterans (age 18+) | 2.2% ±1.3 pts | 3.8% | – |
| With a disability | 11.1% ±3.5 pts | 10.0% | – |
| No health insurance coverage | 3.5% ±3.8 pts | 3.8% | – |
| High school graduate or higher (age 25+) | 97.6% ±2.6 pts | 92.8% | – |
| Bachelor's degree or higher (age 25+) | 70.0% ±6.4 pts | 61.1% | +9.5 pts |
| Graduate or professional degree (age 25+) | 24.4% ±4.7 pts | 27.6% | – |
| Lived in the same house a year earlier | 94.7% ±3.4 pts | 89.7% | – |
| Moved from another state in the past year | 0.0% ±0.7 pts | 1.2% | – |
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 Lucas Valley-Marinwood earn?
Half of Lucas Valley-Marinwood's 2,472 households earn less than $200,761 a year (±$42,266), against $149,091 in Marin County and $99,122 in California. In 2015-2019 it was $169,751 in 2024 dollars; the margins of error cannot tell the two periods apart. 4.2% of residents live below the poverty line.
| Measure | Lucas Valley-Marinwood | Marin County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $200,761 ±$42,266 | $149,091 | no clear change |
| Mean household income | $267,661 ±$37,448 | $232,566 | – |
| Per capita income | $103,811 ±$15,974 | $93,920 | +$24,704 |
| People below the poverty line | 4.2% ±2.3 pts | 8.3% | – |
| Children under 18 below the poverty line | 0.0% ±3.5 pts | 9.8% | – |
| Households receiving SNAP | 2.8% ±2.3 pts | 5.5% | – |
| Households with a computer | 97.5% ±2.9 pts | 97.7% | – |
| Households with a broadband subscription | 97.0% ±3.2 pts | 95.8% | – |
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 Lucas Valley-Marinwood?
Owners occupy 83.3% of Lucas Valley-Marinwood's occupied homes and renters 16.7%. The median owner-occupied home is valued at $1,445,600 by its owner (±$115,433). The median renter pays $3,500 or more a month including utilities.
| Measure | Lucas Valley-Marinwood | Marin County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $1,445,600 ±$115,433 | $1,507,300 | +$243,335 |
| Median gross rent | $3,500 or more | $2,668 | no clear change |
| Renters paying 35% or more of income on rent | 35.5% ±26.1 pts | 47.2% | – |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more | – |
| Owner-occupied homes | 83.3% ±6.5 pts | 64.7% | no clear change |
| Renter-occupied homes | 16.7% ±6.5 pts | 35.3% | – |
| Housing units | 2,592 ±224 | 112,116 | no clear change |
| Homeowner vacancy rate | 0.6% ±1.0 pts | 0.8% | – |
| Rental vacancy rate | 0.0% ±9.7 pts | 3.8% | – |
| Single-family detached homes | 91.2% ±3.3 pts | 63.2% | – |
| Mobile homes | 0.7% ±1.1 pts | 1.3% | – |
| Built 2020 or later | 0.0% ±1.6 pts | 0.3% | – |
| Built 2010 to 2019 | 2.1% ±2.7 pts | 2.6% | – |
| Built 1939 or earlier | 0.7% ±1.1 pts | 12.6% | – |
| Households with no vehicle | 2.5% ±2.9 pts | 4.9% | – |
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 Lucas Valley-Marinwood work and get to work?
54.8% of Lucas Valley-Marinwood's workers drive alone and 30.6% work from home. The average trip to work takes 24.8 minutes.
| Measure | Lucas Valley-Marinwood | Marin County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 56.8% ±5.6 pts | 62.3% | – |
| Unemployment rate | 2.4% ±2.5 pts | 6.1% | – |
| Drove alone to work | 54.8% ±7.4 pts | 51.8% | – |
| Carpooled | 9.4% ±5.2 pts | 7.1% | – |
| Public transportation | 1.5% ±3.0 pts | 3.6% | – |
| Walked | 1.7% ±1.5 pts | 3.5% | – |
| Worked from home | 30.6% ±7.3 pts | 31.5% | +14.8 pts |
| Mean travel time to work | 24.8 min ±4.4 | 27.4 min | no clear change |
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 census tracts are in Lucas Valley-Marinwood?
1 census tract lies mostly in Lucas Valley-Marinwood (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 1070Marin County | 6,477 | $200,761 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Lucas Valley-Marinwood) · Census block assignment files
How does Lucas Valley-Marinwood compare with other places in California?
Lucas Valley-Marinwood ranks 70th of 1,037 places in California with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 601st | 1,076 |
| Residents per square mile | 731st | 1,077 |
| Median household income | 70th | 1,037 |
| Per capita income | 73rd | 1,073 |
| Median home value | 109th | 1,054 |
| Median gross rent | 1st | 987 |
| Poverty rate | 797th | 836 |
| Bachelor's degree or higher | 91st | 988 |
| Median age | 170th | 1,075 |
| Owner-occupied share | 201st | 1,064 |
| Work from home | 109th | 822 |
| Travel time to work | 730th | 1,069 |
Lucas Valley-Marinwood's figures with every place in California (CSV)
Every place in California, sortable · Compare Lucas Valley-Marinwood with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Lucas Valley-Marinwood?
19 of the 57 figures for Lucas Valley-Marinwood 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.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. 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 · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Lucas Valley-Marinwood are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.