Census tract · San Mateo County
Census Tract 6139, San Mateo County, California
Census Tract 6139, GEOID 06081613900, in San Mateo County, California, mostly within Menlo Park (86% of its census blocks). 5,974 residents in the ACS 2020-2024 5-year estimates (±702); the 2020 Census counted 5,963.
Residents, 2020-2024
5,974
±702 (90% margin)
2020 Census count: 5,963
Median household income
$238,953
±$42,432 (90% margin)
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
$2,573
±$375 (90% margin)
San Mateo County: $2,922
Where is Census Tract 6139?
Census Tract 6139 is one of 174 census tracts in San Mateo County, California. It covers 1.05 square miles of land, 5,663 residents per square mile in 2020. Its GEOID, 06081613900, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Menlo Park | 86% |
8 census tracts border Census Tract 6139: Tract 6115 ($250,000 or more), Tract 6116 ($250,000 or more), Tract 6117 ($158,333), Tract 6120.01 ($130,741), Tract 6121.01 ($123,472), Tract 6125 ($165,521), Tract 5112 in Santa Clara County ($250,000 or more) and Tract 5113.02 in Santa Clara County ($139,167). 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 6139?
The 2020-2024 American Community Survey puts Census Tract 6139's population at 5,974 (±702) in 1,988 households; the 2020 Census counted 5,963 residents and 2,323 housing units.
| Measure | Tract 6139 | Menlo Park |
|---|---|---|
| Total population | 5,974 ±702 | 32,727 |
| Households | 1,988 ±221 | 11,837 |
| Average household size | 2.67 ±0.24 | 2.68 |
| Housing units | 2,110 ±197 | 13,388 |
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 6139?
The median resident of Census Tract 6139 is 41.6 years old; 24.5% are under 18 and 16.5% are 65 or older. The largest group is non-Hispanic white residents at 54.0%, then Hispanic or Latino residents (of any race) at 19.5%. 22.7% of residents were born outside the United States.
| Measure | Tract 6139 | Menlo Park |
|---|---|---|
| Median age | 41.6 ±1.9 | 39.5 |
| Under 18 years | 24.5% ±3.5 pts | 21.0% |
| 65 years and over | 16.5% ±4.4 pts | 16.6% |
| Hispanic or Latino (any race) | 19.5% ±6.0 pts | 20.9% |
| White alone, not Hispanic | 54.0% ±7.5 pts | 51.6% |
| Black or African American alone, not Hispanic | 1.3% ±1.0 pts | 2.1% |
| Asian alone, not Hispanic | 15.3% ±4.7 pts | 18.7% |
| American Indian and Alaska Native alone, not Hispanic | 0.3% ±0.7 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.8% ±1.3 pts | 0.2% |
| Two or more races, not Hispanic | 8.4% ±5.1 pts | 5.7% |
| Some other race alone, not Hispanic | 0.5% ±0.7 pts | 0.7% |
| Born outside the United States | 22.7% ±6.2 pts | 30.0% |
| Speak a language other than English at home (age 5+) | 34.4% ±6.8 pts | 39.7% |
| Civilian veterans (age 18+) | 7.8% ±4.5 pts | 3.4% |
| With a disability | 11.7% ±3.5 pts | 8.7% |
| No health insurance coverage | 5.1% ±5.2 pts | 3.4% |
| High school graduate or higher (age 25+) | 93.1% ±3.1 pts | 92.5% |
| Bachelor's degree or higher (age 25+) | 75.0% ±5.9 pts | 72.5% |
| Graduate or professional degree (age 25+) | 45.8% ±7.2 pts | 45.0% |
| Lived in the same house a year earlier | 83.1% ±6.1 pts | 83.1% |
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 6139 earn?
Half of the 1,988 households in Census Tract 6139 earn less than $238,953 a year (±$42,432), against $158,855 across San Mateo County: 29th highest of the county's 172 tracts with a reliable estimate. 11.9% of residents live below the poverty line.
| Measure | Tract 6139 | Menlo Park |
|---|---|---|
| Median household income | $238,953 ±$42,432 | $210,025 |
| Mean household income | $427,742 ±$67,836 | $347,039 |
| Per capita income | $148,581 ±$21,213 | $128,814 |
| People below the poverty line | 11.9% ±5.4 pts | 5.8% |
| Children under 18 below the poverty line | 4.5% ±6.6 pts | 2.4% |
| Households receiving SNAP | 0.8% ±1.3 pts | 4.7% |
| Households with a computer | 98.2% ±2.1 pts | 97.9% |
| Households with a broadband subscription | 96.7% ±3.1 pts | 96.7% |
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 6139?
Owners occupy 64.0% of Census Tract 6139's occupied homes and renters 36.0%. The median owner-occupied home is valued at $2,000,000 or more by its owner (). The median renter pays $2,573 a month including utilities, and 42.1% of renters pay 35% or more of their income on rent.
| Measure | Tract 6139 | Menlo Park |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 or more | $2,000,000 or more |
| Median gross rent | $2,573 ±$375 | $3,239 |
| Renters paying 35% or more of income on rent | 42.1% ±15.7 pts | 36.5% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 64.0% ±7.0 pts | 54.2% |
| Renter-occupied homes | 36.0% ±7.0 pts | 45.8% |
| Housing units | 2,110 ±197 | 13,388 |
| Single-family detached homes | 71.5% ±6.3 pts | 53.6% |
| Mobile homes | 0.0% ±2.0 pts | 0.3% |
| Built 2020 or later | 0.0% ±2.0 pts | 1.1% |
| Built 2010 to 2019 | 5.9% ±5.0 pts | 11.7% |
| Built 1939 or earlier | 17.8% ±6.5 pts | 7.1% |
| Households with no vehicle | 8.2% ±6.1 pts | 7.9% |
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 Census Tract 6139 get to work?
40.2% of Census Tract 6139's workers drive alone and 36.0% work from home. The average trip to work takes 25.1 minutes. The unemployment rate in 2020-2024 averaged 6.0%.
| Measure | Tract 6139 | Menlo Park |
|---|---|---|
| In the labor force (age 16+) | 64.9% ±5.9 pts | 65.9% |
| Unemployment rate | 6.0% ±2.8 pts | 4.8% |
| Drove alone to work | 40.2% ±7.3 pts | 48.4% |
| Carpooled | 6.0% ±4.0 pts | 6.0% |
| Public transportation | 2.6% ±2.8 pts | 2.0% |
| Walked | 3.3% ±3.7 pts | 1.7% |
| Worked from home | 36.0% ±8.9 pts | 32.4% |
| Mean travel time to work | 25.1 min ±4.0 | 23.9 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 6139 compare with the other tracts in San Mateo County?
Among San Mateo County's tracts with a reliable estimate, Census Tract 6139 ranks as shown below (1 = highest).
| Measure | In San Mateo County | In Menlo Park |
|---|---|---|
| Population | 25th of 172 | 2nd of 8 |
| Residents per square mile | 118th of 173 | 4th of 8 |
| Median household income | 29th of 172 | 5th of 8 |
| Per capita income | 11th of 172 | 3rd of 8 |
| Median home value | 1st of 171 | 1st of 8 |
| Median gross rent | 131st of 169 | 8th of 8 |
| Poverty rate | 16th of 94 | 1st of 3 |
| Bachelor's degree or higher | 25th of 172 | 6th of 8 |
| Median age | 88th of 172 | 4th of 8 |
| Owner-occupied share | 91st of 171 | 5th of 8 |
The tracts next to it on San Mateo County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 6073 | 26th | $243,281±$32,725 · within the margin of this tract |
| Tract 6080.02 | 27th | $242,826±$33,669 · within the margin of this tract |
| Tract 6091 | 28th | $242,750±$127,475 · within the margin of this tract |
| Tract 6139 | 29th | $238,953±$42,432 |
| Tract 6087 | 30th | $238,466±$35,379 · within the margin of this tract |
| Tract 6075 | 31st | $233,378±$27,503 · within the margin of this tract |
| Tract 6112 | 32nd | $233,097±$36,033 · 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 6139?
1 of the 18 figures for Census Tract 6139 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