Census tract · San Mateo County
Census Tract 6100, San Mateo County, California
Census Tract 6100, GEOID 06081610000, in San Mateo County, California, entirely within Redwood City. 4,477 residents in the ACS 2020-2024 5-year estimates (±752); the 2020 Census counted 4,782.
Residents, 2020-2024
4,477
±752 (90% margin)
2020 Census count: 4,782
Median household income
$164,852
±$40,788 (90% margin)
San Mateo County: $158,855
Median home value
$2,000,000
±$263,237 (90% margin)
San Mateo County: $1,559,600
Median gross rent
$2,741
±$287 (90% margin)
San Mateo County: $2,922
Where is Census Tract 6100?
Census Tract 6100 is one of 174 census tracts in San Mateo County, California. It covers 0.53 square miles of land, 9,006 residents per square mile in 2020. Its GEOID, 06081610000, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Redwood City | 100% |
6 census tracts border Census Tract 6100: Tract 6093 ($250,000 or more), Tract 6099 ($250,000 or more), Tract 6101 ($128,472), Tract 6102.02 ($185,920), Tract 6109.01 ($142,793) and Tract 6110 ($140,426). 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 6100?
The 2020-2024 American Community Survey puts Census Tract 6100's population at 4,477 (±752) in 1,895 households; the 2020 Census counted 4,782 residents and 2,099 housing units.
| Measure | Tract 6100 | Redwood City |
|---|---|---|
| Total population | 4,477 ±752 | 82,447 |
| Households | 1,895 ±240 | 29,951 |
| Average household size | 2.33 ±0.33 | 2.69 |
| Housing units | 1,960 ±236 | 32,135 |
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 6100?
The median resident of Census Tract 6100 is 39.9 years old; 21.0% are under 18 and 16.6% are 65 or older. The largest group is non-Hispanic white residents at 57.1%, then Hispanic or Latino residents (of any race) at 22.3%. 24.4% of residents were born outside the United States.
| Measure | Tract 6100 | Redwood City |
|---|---|---|
| Median age | 39.9 ±3.2 | 37.5 |
| Under 18 years | 21.0% ±6.0 pts | 21.3% |
| 65 years and over | 16.6% ±4.8 pts | 13.8% |
| Hispanic or Latino (any race) | 22.3% ±5.7 pts | 35.6% |
| White alone, not Hispanic | 57.1% ±7.6 pts | 36.7% |
| Black or African American alone, not Hispanic | 1.0% ±1.3 pts | 2.9% |
| Asian alone, not Hispanic | 7.6% ±3.5 pts | 18.0% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.9 pts | 0.1% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.9 pts | 0.5% |
| Two or more races, not Hispanic | 11.1% ±4.7 pts | 5.3% |
| Some other race alone, not Hispanic | 0.8% ±1.0 pts | 0.9% |
| Born outside the United States | 24.4% ±5.7 pts | 32.9% |
| Speak a language other than English at home (age 5+) | 26.0% ±6.2 pts | 46.5% |
| Civilian veterans (age 18+) | 2.2% ±1.6 pts | 2.1% |
| With a disability | 9.7% ±5.1 pts | 8.7% |
| No health insurance coverage | 1.9% ±2.8 pts | 4.6% |
| High school graduate or higher (age 25+) | 94.1% ±3.6 pts | 87.1% |
| Bachelor's degree or higher (age 25+) | 61.5% ±7.0 pts | 54.4% |
| Graduate or professional degree (age 25+) | 24.6% ±6.1 pts | 26.9% |
| Lived in the same house a year earlier | 85.0% ±6.3 pts | 86.1% |
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 6100 earn?
Half of the 1,895 households in Census Tract 6100 earn less than $164,852 a year (±$40,788), against $158,855 across San Mateo County: 79th highest of the county's 172 tracts with a reliable estimate.
| Measure | Tract 6100 | Redwood City |
|---|---|---|
| Median household income | $164,852 ±$40,788 | $157,814 |
| Mean household income | $250,299 ±$46,121 | $226,989 |
| Per capita income | $110,415 ±$24,960 | $84,106 |
| People below the poverty line | 3.8% ±3.2 pts | 6.3% |
| Children under 18 below the poverty line | 0.0% ±4.4 pts | 5.6% |
| Households receiving SNAP | 3.5% ±4.1 pts | 6.2% |
| Households with a computer | 97.2% ±3.3 pts | 98.4% |
| Households with a broadband subscription | 92.1% ±5.7 pts | 95.4% |
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 6100?
Owners occupy 39.4% of Census Tract 6100's occupied homes and renters 60.6%. The median owner-occupied home is valued at $2,000,000 by its owner (±$263,237). The median renter pays $2,741 a month including utilities, and 25.6% of renters pay 35% or more of their income on rent.
| Measure | Tract 6100 | Redwood City |
|---|---|---|
| Median home value (owner-occupied) | $2,000,000 ±$263,237 | $1,801,700 |
| Median gross rent | $2,741 ±$287 | $2,968 |
| Renters paying 35% or more of income on rent | 25.6% ±11.0 pts | 41.6% |
| Median monthly owner costs, with a mortgage | $4,000 or more | $4,000 or more |
| Owner-occupied homes | 39.4% ±7.6 pts | 48.6% |
| Renter-occupied homes | 60.6% ±7.6 pts | 51.4% |
| Housing units | 1,960 ±236 | 32,135 |
| Single-family detached homes | 45.6% ±9.5 pts | 43.2% |
| Mobile homes | 0.0% ±2.1 pts | 1.9% |
| Built 2020 or later | 0.0% ±2.1 pts | 1.0% |
| Built 2010 to 2019 | 2.0% ±1.6 pts | 9.9% |
| Built 1939 or earlier | 35.2% ±7.6 pts | 8.1% |
| Households with no vehicle | 5.9% ±4.4 pts | 6.2% |
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 6100 get to work?
46.4% of Census Tract 6100's workers drive alone and 44.8% work from home. The average trip to work takes 23.6 minutes.
| Measure | Tract 6100 | Redwood City |
|---|---|---|
| In the labor force (age 16+) | 73.4% ±5.4 pts | 69.0% |
| Unemployment rate | 1.1% ±1.2 pts | 4.1% |
| Drove alone to work | 46.4% ±7.8 pts | 55.3% |
| Carpooled | 2.4% ±2.1 pts | 9.5% |
| Public transportation | 3.1% ±2.8 pts | 3.8% |
| Walked | 2.5% ±2.0 pts | 2.4% |
| Worked from home | 44.8% ±8.5 pts | 26.7% |
| Mean travel time to work | 23.6 min ±3.5 | 24.3 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 6100 compare with the other tracts in San Mateo County?
Among San Mateo County's tracts with a reliable estimate, Census Tract 6100 ranks as shown below (1 = highest).
| Measure | In San Mateo County | In Redwood City |
|---|---|---|
| Population | 73rd of 172 | 11th of 19 |
| Residents per square mile | 74th of 173 | 10th of 19 |
| Median household income | 79th of 172 | 9th of 19 |
| Per capita income | 44th of 172 | 7th of 19 |
| Median home value | 54th of 171 | 6th of 18 |
| Median gross rent | 120th of 169 | 14th of 19 |
| Bachelor's degree or higher | 67th of 172 | 8th of 19 |
| Median age | 116th of 172 | 9th of 19 |
| Owner-occupied share | 134th of 171 | 14th of 18 |
The tracts next to it on San Mateo County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 6126 | 76th | $166,685±$64,949 · within the margin of this tract |
| Tract 6092.01 | 77th | $165,583±$34,715 · within the margin of this tract |
| Tract 6125 | 78th | $165,521±$41,872 · within the margin of this tract |
| Tract 6100 | 79th | $164,852±$40,788 |
| Tract 6032 | 80th | $163,882±$45,532 · within the margin of this tract |
| Tract 6136 | 81st | $163,250±$25,925 · within the margin of this tract |
| Tract 6027 | 82nd | $162,458±$21,443 · 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 6100?
2 of the 18 figures for Census Tract 6100 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