Census tract · San Mateo County
Census Tract 6138, San Mateo County, California
Census Tract 6138, GEOID 06081613800, in San Mateo County, California, partly within La Honda, Pescadero and Loma Mar. 4,356 residents in the ACS 2020-2024 5-year estimates (±663); the 2020 Census counted 4,299.
Residents, 2020-2024
4,356
±663 (90% margin)
2020 Census count: 4,299
Median household income
$222,881
±$71,488 (90% margin)
San Mateo County: $158,855
Median home value
$1,114,800
±$155,526 (90% margin)
San Mateo County: $1,559,600
Median gross rent
$1,162
±$699 (90% margin)
San Mateo County: $2,922
Where is Census Tract 6138?
Census Tract 6138 is one of 174 census tracts in San Mateo County, California. It covers 180.63 square miles of land, 24 residents per square mile in 2020. Its GEOID, 06081613800, names it uniquely (how tract numbers and GEOIDs work).
6 census tracts border Census Tract 6138: Tract 6132 ($250,000 or more), Tract 6134 ($250,000 or more), Tract 6137.02 ($112,609), Tract 5117.07 in Santa Clara County ($203,068), Tract 1202 in Santa Cruz County ($133,750) and Tract 1205 in Santa Cruz County ($153,854). 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 6138?
The 2020-2024 American Community Survey puts Census Tract 6138's population at 4,356 (±663) in 1,630 households; the 2020 Census counted 4,299 residents and 1,990 housing units.
| Measure | Tract 6138 | San Mateo County |
|---|---|---|
| Total population | 4,356 ±663 | 742,340 |
| Households | 1,630 ±227 | 264,419 |
| Average household size | 2.57 ±0.37 | 2.76 |
| Housing units | 2,201 ±303 | 287,184 |
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 6138?
The median resident of Census Tract 6138 is 45.6 years old; 16.6% are under 18 and 23.1% are 65 or older. The largest group is non-Hispanic white residents at 60.6%, then Hispanic or Latino residents (of any race) at 26.2%. 31.4% of residents were born outside the United States.
| Measure | Tract 6138 | San Mateo County |
|---|---|---|
| Median age | 45.6 ±5.9 | 40.9 |
| Under 18 years | 16.6% ±5.9 pts | 19.5% |
| 65 years and over | 23.1% ±7.0 pts | 17.8% |
| Hispanic or Latino (any race) | 26.2% ±12.1 pts | 24.9% |
| White alone, not Hispanic | 60.6% ±12.0 pts | 34.7% |
| Black or African American alone, not Hispanic | 0.0% ±1.0 pts | 2.0% |
| Asian alone, not Hispanic | 4.6% ±3.9 pts | 31.0% |
| 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 | 1.1% |
| Two or more races, not Hispanic | 6.0% ±5.3 pts | 5.2% |
| Some other race alone, not Hispanic | 2.6% ±3.3 pts | 0.9% |
| Born outside the United States | 31.4% ±10.3 pts | 35.7% |
| Speak a language other than English at home (age 5+) | 33.8% ±9.8 pts | 45.8% |
| Civilian veterans (age 18+) | 2.3% ±1.6 pts | 2.9% |
| With a disability | 5.5% ±3.8 pts | 9.4% |
| No health insurance coverage | 5.4% ±4.6 pts | 3.8% |
| High school graduate or higher (age 25+) | 84.2% ±8.5 pts | 90.2% |
| Bachelor's degree or higher (age 25+) | 52.2% ±8.9 pts | 53.7% |
| Graduate or professional degree (age 25+) | 34.4% ±8.0 pts | 24.1% |
| Lived in the same house a year earlier | 93.5% ±4.4 pts | 88.4% |
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 6138 earn?
Half of the 1,630 households in Census Tract 6138 earn less than $222,881 a year (±$71,488), against $158,855 across San Mateo County: 36th highest of the county's 172 tracts with a reliable estimate.
| Measure | Tract 6138 | San Mateo County |
|---|---|---|
| Median household income | $222,881 ±$71,488 | $158,855 |
| Mean household income | $237,011 ±$40,857 | $231,822 |
| Per capita income | $90,290 ±$20,246 | $84,288 |
| People below the poverty line | 12.5% ±12.5 pts | 6.7% |
| Children under 18 below the poverty line | 14.0% ±19.6 pts | 6.2% |
| Households receiving SNAP | 0.5% ±0.7 pts | 5.1% |
| Households with a computer | 92.4% ±7.3 pts | 97.7% |
| Households with a broadband subscription | 89.8% ±7.8 pts | 95.7% |
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 6138?
Owners occupy 70.9% of Census Tract 6138's occupied homes and renters 29.1%. The median owner-occupied home is valued at $1,114,800 by its owner (±$155,526). The median renter pays $1,162 a month including utilities.
| Measure | Tract 6138 | San Mateo County |
|---|---|---|
| Median home value (owner-occupied) | $1,114,800 ±$155,526 | $1,559,600 |
| Median gross rent | $1,162 ±$699 | $2,922 |
| Renters paying 35% or more of income on rent | 34.9% ±23.8 pts | 40.3% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 70.9% ±10.8 pts | 58.5% |
| Renter-occupied homes | 29.1% ±10.8 pts | 41.5% |
| Housing units | 2,201 ±303 | 287,184 |
| Single-family detached homes | 85.7% ±7.7 pts | 55.3% |
| Mobile homes | 7.9% ±6.1 pts | 1.1% |
| Built 2020 or later | 0.0% ±1.9 pts | 1.0% |
| Built 2010 to 2019 | 2.7% ±2.7 pts | 5.4% |
| Built 1939 or earlier | 23.9% ±8.2 pts | 8.6% |
| Households with no vehicle | 2.3% ±2.7 pts | 5.8% |
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 6138 get to work?
57.3% of Census Tract 6138's workers drive alone and 24.5% work from home. The average trip to work takes 34.2 minutes.
| Measure | Tract 6138 | San Mateo County |
|---|---|---|
| In the labor force (age 16+) | 66.7% ±7.9 pts | 67.3% |
| Unemployment rate | 3.0% ±2.3 pts | 4.8% |
| Drove alone to work | 57.3% ±10.6 pts | 56.7% |
| Carpooled | 15.2% ±8.0 pts | 8.7% |
| Public transportation | 0.0% ±1.8 pts | 5.1% |
| Walked | 3.1% ±4.1 pts | 2.3% |
| Worked from home | 24.5% ±6.9 pts | 24.3% |
| Mean travel time to work | 34.2 min ±5.4 | 26.4 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 6138 compare with the other tracts in San Mateo County?
Among San Mateo County's tracts with a reliable estimate, Census Tract 6138 ranks as shown below (1 = highest).
| Measure | In San Mateo County |
|---|---|
| Population | 80th of 172 |
| Residents per square mile | 172nd of 173 |
| Median household income | 36th of 172 |
| Per capita income | 72nd of 172 |
| Median home value | 139th of 171 |
| Median gross rent | 169th of 169 |
| Bachelor's degree or higher | 91st of 172 |
| Median age | 33rd of 172 |
| Owner-occupied share | 66th of 171 |
The tracts next to it on San Mateo County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 6082 | 33rd | $233,094±$73,028 · within the margin of this tract |
| Tract 6113 | 34th | $229,612±$32,292 · within the margin of this tract |
| Tract 6047 | 35th | $226,667±$39,179 · within the margin of this tract |
| Tract 6138 | 36th | $222,881±$71,488 |
| Tract 6070 | 37th | $222,768±$78,069 · within the margin of this tract |
| Tract 6050 | 38th | $222,614±$34,217 · within the margin of this tract |
| Tract 6103.03 | 39th | $222,107±$28,953 · 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 6138?
3 of the 18 figures for Census Tract 6138 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.
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