Census tract · San Mateo County
Census Tract 6129, San Mateo County, California
Census Tract 6129, GEOID 06081612900, in San Mateo County, California, mostly within West Menlo Park (81% of its census blocks). 4,517 residents in the ACS 2020-2024 5-year estimates (±515); the 2020 Census counted 4,728.
Residents, 2020-2024
4,517
±515 (90% margin)
2020 Census count: 4,728
Median household income
$250,000 or more
The survey's top or bottom value; no margin is published
San Mateo County: $158,855
Median home value
$2,000,000 or more
The survey's top or bottom value; no margin is published
San Mateo County: $1,559,600
Median gross rent
$3,500 or more
The survey's top or bottom value; no margin is published
San Mateo County: $2,922
Where is Census Tract 6129?
Census Tract 6129 is one of 174 census tracts in San Mateo County, California. It covers 0.61 square miles of land, 7,700 residents per square mile in 2020. Its GEOID, 06081612900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| West Menlo Park | 81% |
| Menlo Park | 19% |
3 census tracts border Census Tract 6129: Tract 6114 ($250,000 or more), Tract 6128 ($250,000 or more) and Tract 6130 ($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 6129?
The 2020-2024 American Community Survey puts Census Tract 6129's population at 4,517 (±515) in 1,611 households; the 2020 Census counted 4,728 residents and 1,892 housing units.
| Measure | Tract 6129 | West Menlo Park |
|---|---|---|
| Total population | 4,517 ±515 | 3,634 |
| Households | 1,611 ±137 | 1,287 |
| Average household size | 2.79 ±0.19 | 2.81 |
| Housing units | 1,958 ±227 | 1,580 |
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 6129?
The median resident of Census Tract 6129 is 40.8 years old; 26.3% are under 18 and 16.4% are 65 or older. The largest group is non-Hispanic white residents at 66.2%, then non-Hispanic Asian residents at 20.3%. 24.9% of residents were born outside the United States.
| Measure | Tract 6129 | West Menlo Park |
|---|---|---|
| Median age | 40.8 ±3.5 | 40.6 |
| Under 18 years | 26.3% ±3.8 pts | 27.7% |
| 65 years and over | 16.4% ±2.7 pts | 13.1% |
| Hispanic or Latino (any race) | 6.1% ±3.5 pts | 7.1% |
| White alone, not Hispanic | 66.2% ±6.1 pts | 66.3% |
| Black or African American alone, not Hispanic | 0.0% ±0.1 pts | 0.1% |
| Asian alone, not Hispanic | 20.3% ±4.5 pts | 18.7% |
| American Indian and Alaska Native alone, not Hispanic | 0.1% ±0.2 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.0% |
| Two or more races, not Hispanic | 7.3% ±4.3 pts | 7.8% |
| Some other race alone, not Hispanic | 0.0% ±0.9 pts | 0.0% |
| Born outside the United States | 24.9% ±7.8 pts | 19.5% |
| Speak a language other than English at home (age 5+) | 26.8% ±6.6 pts | 23.4% |
| Civilian veterans (age 18+) | 2.9% ±1.0 pts | 2.5% |
| With a disability | 7.3% ±2.4 pts | 7.1% |
| No health insurance coverage | 0.0% ±0.9 pts | 0.0% |
| High school graduate or higher (age 25+) | 99.5% ±0.7 pts | 99.3% |
| Bachelor's degree or higher (age 25+) | 86.2% ±3.4 pts | 86.5% |
| Graduate or professional degree (age 25+) | 53.7% ±5.4 pts | 50.2% |
| Lived in the same house a year earlier | 86.7% ±6.7 pts | 87.3% |
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 6129 earn?
Half of the 1,611 households in Census Tract 6129 earn less than $250,000 or more a year (), against $158,855 across San Mateo County: 1st highest of the county's 172 tracts with a reliable estimate. 2.2% of residents live below the poverty line.
| Measure | Tract 6129 | West Menlo Park |
|---|---|---|
| Median household income | $250,000 or more | $250,000 or more |
| Mean household income | $450,270 ±$54,266 | $461,728 |
| Per capita income | $161,837 ±$19,627 | $164,578 |
| People below the poverty line | 2.2% ±1.4 pts | 3.0% |
| Children under 18 below the poverty line | 0.8% ±1.5 pts | 1.0% |
| Households receiving SNAP | 0.0% ±2.6 pts | 0.0% |
| Households with a computer | 99.0% ±1.2 pts | 99.3% |
| Households with a broadband subscription | 96.8% ±2.5 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 6129?
Owners occupy 79.8% of Census Tract 6129's occupied homes and renters 20.2%. 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 6129 | West Menlo Park |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $2,000,000 or more |
| Median gross rent | $3,500 or more | $3,324 |
| Renters paying 35% or more of income on rent | 31.0% ±21.3 pts | 31.9% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 79.8% ±5.9 pts | 78.3% |
| Renter-occupied homes | 20.2% ±5.9 pts | 21.7% |
| Housing units | 1,958 ±227 | 1,580 |
| Single-family detached homes | 69.5% ±7.2 pts | 83.0% |
| Mobile homes | 0.0% ±2.1 pts | 0.0% |
| Built 2020 or later | 1.9% ±1.6 pts | 1.4% |
| Built 2010 to 2019 | 6.8% ±3.7 pts | 11.1% |
| Built 1939 or earlier | 7.3% ±2.8 pts | 6.8% |
| Households with no vehicle | 4.2% ±2.1 pts | 3.6% |
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 6129 get to work?
49.0% of Census Tract 6129's workers drive alone and 35.8% work from home. The average trip to work takes 22.4 minutes. The unemployment rate in 2020-2024 averaged 6.3%.
| Measure | Tract 6129 | West Menlo Park |
|---|---|---|
| In the labor force (age 16+) | 64.3% ±4.8 pts | 65.8% |
| Unemployment rate | 6.3% ±3.2 pts | 6.3% |
| Drove alone to work | 49.0% ±8.1 pts | 45.6% |
| Carpooled | 4.2% ±3.0 pts | 3.3% |
| Public transportation | 1.7% ±1.4 pts | 1.5% |
| Walked | 1.7% ±2.1 pts | 2.1% |
| Worked from home | 35.8% ±8.8 pts | 40.9% |
| Mean travel time to work | 22.4 min ±2.9 | 20.7 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 6129 compare with the other tracts in San Mateo County?
Among San Mateo County's tracts with a reliable estimate, Census Tract 6129 ranks as shown below (1 = highest).
| Measure | In San Mateo County |
|---|---|
| Population | 67th of 172 |
| Residents per square mile | 94th of 173 |
| Median household income | 1st of 172 |
| Per capita income | 8th of 172 |
| Median home value | 1st of 171 |
| Median gross rent | 1st of 169 |
| Poverty rate | 93rd of 94 |
| Bachelor's degree or higher | 3rd of 172 |
| Median age | 100th of 172 |
| Owner-occupied share | 47th of 171 |
The tracts next to it on San Mateo County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 6056 | 1st | $250,000 or more |
| Tract 6057 | 1st | $250,000 or more |
| Tract 6069 | 1st | $250,000 or more |
| Tract 6071 | 1st | $250,000 or more |
| Tract 6080.23 | 1st | $250,000 or more |
| Tract 6088 | 1st | $250,000 or more |
| Tract 6093 | 1st | $250,000 or more |
| Tract 6094 | 1st | $250,000 or more |
| Tract 6095 | 1st | $250,000 or more |
| Tract 6096.01 | 1st | $250,000 or more |
| Tract 6096.02 | 1st | $250,000 or more |
| Tract 6097 | 1st | $250,000 or more |
| Tract 6098 | 1st | $250,000 or more |
| Tract 6099 | 1st | $250,000 or more |
| Tract 6114 | 1st | $250,000 or more |
| Tract 6115 | 1st | $250,000 or more |
| Tract 6116 | 1st | $250,000 or more |
| Tract 6127 | 1st | $250,000 or more |
| Tract 6128 | 1st | $250,000 or more |
| Tract 6129 | 1st | $250,000 or more |
| Tract 6130 | 1st | $250,000 or more |
| Tract 6132 | 1st | $250,000 or more |
| Tract 6133 | 1st | $250,000 or more |
| Tract 6134 | 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 6129?
1 of the 18 figures for Census Tract 6129 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