Census tract · San Mateo County

Census Tract 6091, San Mateo County, California

Census Tract 6091, GEOID 06081609100, in San Mateo County, California, mostly within San Carlos (95% of its census blocks). 1,541 residents in the ACS 2020-2024 5-year estimates (±183); the 2020 Census counted 1,647.

Residents, 2020-2024

1,541

±183 (90% margin)
2020 Census count: 1,647

Median household income

$242,750

±$127,475 (90% margin)
San Mateo County: $158,855

Median home value

$1,683,500

±$88,161 (90% margin)
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 6091?

Census Tract 6091 is one of 174 census tracts in San Mateo County, California. It covers 1.29 square miles of land, 1,281 residents per square mile in 2020. Its GEOID, 06081609100, names it uniquely (how tract numbers and GEOIDs work).

Places Census Tract 6091 lies in (share of its 2020 census blocks)
Place	Share of the tract
San Carlos	95%

Census Tract 6091 (marked with a dot) in San Mateo County, California. Boundaries: Census Bureau 2024.

Census Tract 6091 (shaded) and the tracts that border it, numbered. Boundaries: Census Bureau 2024 cartographic boundary file, 1:500,000.

9 census tracts border Census Tract 6091: Tract 6086 ($146,389), Tract 6090 ($203,636), Tract 6092.01 ($165,583), Tract 6092.02 ($186,333), Tract 6093 ($250,000 or more), Tract 6101 ($128,472), Tract 6102.02 ($185,920), Tract 6103.02 ($142,212) and Tract 6103.04 ($200,426). 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 6091?

The 2020-2024 American Community Survey puts Census Tract 6091's population at 1,541 (±183) in 561 households; the 2020 Census counted 1,647 residents and 623 housing units.

Counts, ACS 2020-2024 5-year estimates
Measure	Tract 6091	San Carlos	San Mateo County	California
Total population	1,541±183	29,614	742,340	39,287,377
Households	561±75	11,001	264,419	13,548,091
Average household size	2.73±0.21	2.68	2.76	2.84
Housing units	618±63	11,627	287,184	14,644,735

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 6091?

The median resident of Census Tract 6091 is 39.3 years old; 19.6% are under 18 and 10.3% are 65 or older. The largest group is non-Hispanic white residents at 48.3%, then non-Hispanic Asian residents at 32.2%. 32.3% of residents were born outside the United States.

Age, origin, education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Tract 6091	San Carlos	San Mateo County	California
Median age	39.3±2.0	41.7	40.9	37.9
Under 18 years	19.6%±3.3 pts	23.4%	19.5%	22.0%
65 years and over	10.3%±4.3 pts	16.5%	17.8%	15.7%
Hispanic or Latino (any race)	13.7%±8.6 pts	10.9%	24.9%	40.2%
White alone, not Hispanic	48.3%±9.9 pts	55.7%	34.7%	33.8%
Black or African American alone, not Hispanic	0.1%±0.4 pts	0.6%	2.0%	5.2%
Asian alone, not Hispanic	32.2%±10.8 pts	23.4%	31.0%	15.3%
American Indian and Alaska Native alone, not Hispanic	0.0%±2.7 pts	0.0%	0.1%	0.3%
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±2.7 pts	0.7%	1.1%	0.3%
Two or more races, not Hispanic	5.5%±4.4 pts	7.5%	5.2%	4.4%
Some other race alone, not Hispanic	0.2%±0.3 pts	1.1%	0.9%	0.6%
Born outside the United States	32.3%±7.7 pts	25.9%	35.7%	27.0%
Speak a language other than English at home (age 5+)	34.5%±10.2 pts	28.5%	45.8%	44.4%
Civilian veterans (age 18+)	2.3%±1.6 pts	2.4%	2.9%	4.3%
With a disability	9.8%±3.8 pts	7.5%	9.4%	11.6%
No health insurance coverage	1.1%±1.4 pts	0.6%	3.8%	6.6%
High school graduate or higher (age 25+)	91.7%±6.3 pts	97.0%	90.2%	84.7%
Bachelor's degree or higher (age 25+)	57.4%±9.1 pts	70.2%	53.7%	37.1%
Graduate or professional degree (age 25+)	29.9%±7.1 pts	37.6%	24.1%	14.4%
Lived in the same house a year earlier	86.4%±9.6 pts	90.3%	88.4%	89.2%

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 Census Tract 6091 earn?

Half of the 561 households in Census Tract 6091 earn less than $242,750 a year (±$127,475), against $158,855 across San Mateo County: 28th highest of the county's 172 tracts with a reliable estimate.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Tract 6091	San Carlos	San Mateo County	California
Median household income	$242,750±$127,475	$237,470	$158,855	$99,122
Mean household income	$318,668±$67,853	$338,651	$231,822	$140,436
Per capita income	$123,118±$25,954	$127,894	$84,288	$49,513
People below the poverty line	5.2%±3.7 pts	3.3%	6.7%	12.0%
Children under 18 below the poverty line	0.0%±13.1 pts	4.2%	6.2%	15.0%
Households receiving SNAP	2.1%±2.2 pts	1.2%	5.1%	12.4%
Households with a computer	96.4%±4.2 pts	99.7%	97.7%	96.9%
Households with a broadband subscription	94.1%±4.8 pts	98.5%	95.7%	93.5%

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 6091?

Owners occupy 75.2% of Census Tract 6091's occupied homes and renters 24.8%. The median owner-occupied home is valued at $1,683,500 by its owner (±$88,161). The median renter pays $3,500 or more a month including utilities.

Housing, ACS 2020-2024 5-year estimates
Measure	Tract 6091	San Carlos	San Mateo County	California
Median home value (owner-occupied)	$1,683,500±$88,161	$2,000,000 or more	$1,559,600	$734,700
Median gross rent	$3,500 or more	$2,854	$2,922	$2,036
Renters paying 35% or more of income on rent	28.4%±24.0 pts	29.0%	40.3%	46.0%
Median monthly owner costs, with a mortgage	$4,000 or more	$4,000 or more	$4,000 or more	$2,946
Owner-occupied homes	75.2%±10.2 pts	67.8%	58.5%	55.9%
Renter-occupied homes	24.8%±10.2 pts	32.2%	41.5%	44.1%
Housing units	618±63	11,627	287,184	14,644,735
Single-family detached homes	79.8%±8.9 pts	66.8%	55.3%	57.0%
Mobile homes	14.7%±6.8 pts	0.0%	1.1%	3.5%
Built 2020 or later	0.0%±6.6 pts	1.8%	1.0%	1.3%
Built 2010 to 2019	2.9%±3.1 pts	4.4%	5.4%	6.5%
Built 1939 or earlier	6.5%±3.7 pts	7.5%	8.6%	8.9%
Households with no vehicle	0.9%±1.5 pts	4.1%	5.8%	7.1%

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 6091 get to work?

46.5% of Census Tract 6091's workers drive alone and 43.4% work from home. The average trip to work takes 24.7 minutes. The unemployment rate in 2020-2024 averaged 7.4%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Tract 6091	San Carlos	San Mateo County	California
In the labor force (age 16+)	76.9%±5.8 pts	69.9%	67.3%	63.8%
Unemployment rate	7.4%±3.9 pts	5.0%	4.8%	6.6%
Drove alone to work	46.5%±11.3 pts	52.3%	56.7%	65.7%
Carpooled	6.0%±4.2 pts	4.2%	8.7%	9.5%
Public transportation	2.9%±2.3 pts	3.2%	5.1%	2.9%
Walked	1.3%±1.4 pts	1.2%	2.3%	2.4%
Worked from home	43.4%±12.1 pts	35.0%	24.3%	17.2%
Mean travel time to work	24.7 min±3.6	24.6 min	26.4 min	28.7 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 6091 compare with the other tracts in San Mateo County?

Among San Mateo County's tracts with a reliable estimate, Census Tract 6091 ranks as shown below (1 = highest).

Census Tract 6091's rank among the tracts of San Mateo County and of San Carlos
Measure	In San Mateo County	In San Carlos
Population	172nd of 172	9th of 9
Residents per square mile	158th of 173	9th of 9
Median household income	28th of 172	7th of 9
Per capita income	26th of 172	8th of 9
Median home value	66th of 171	9th of 9
Median gross rent	1st of 169	1st of 9
Bachelor's degree or higher	79th of 172	9th of 9
Median age	121st of 172	8th of 9
Owner-occupied share	57th of 171	7th of 9

The tracts next to it on San Mateo County's income ladder

Median household income, ACS 2020-2024 5-year estimates
Tract	Rank	Median household income	Residents
Tract 6096.03	25th	$247,422±$38,592 · within the margin of this tract	4,813
Tract 6073	26th	$243,281±$32,725 · within the margin of this tract	3,511
Tract 6080.02	27th	$242,826±$33,669 · within the margin of this tract	3,665
Tract 6091	28th	$242,750±$127,475	1,541
Tract 6139	29th	$238,953±$42,432 · within the margin of this tract	5,974
Tract 6087	30th	$238,466±$35,379 · within the margin of this tract	7,142
Tract 6075	31st	$233,378±$27,503 · within the margin of this tract	6,569

"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 6091?

2 of the 18 figures for Census Tract 6091 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