Data / Households / San Mateo County

Households in San Mateo County

Households in San Mateo County was 264,419 in 2024, according to the U.S. Census Bureau. That is unchanged from 2023. That is the 14th highest of 58 counties in 2024.

2024, count264,419
Change on 2023-0%
Rank14th of 58Counties in California ranked
Series high264,8922021
Series low264,3232022

Next release: Friday, 29 January 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

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Households in San Mateo County, 2021 to 2024

264.2K264.4K264.6K264.8K265K20212022202320242021: 264,892 count2022: 264,323 count2023: 264,424 count2024: 264,419 count264.2K264.4K264.6K264.8K265K202120242021: 264,892 count2022: 264,323 count2023: 264,424 count2024: 264,419 count
count. Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved 2026-10-12, published 2026-01-29.
All 4 values
Periodcount
2024264,419
2023264,424
2022264,323
2021264,892

Compared with California and United States

Place2024
San Mateo County264,419
California13,548,091
United States129,227,496

San Mateo County compared with nearby places

Alameda County: 598,246 countAlpine County: 435 countAmador County: 16,091 countButte County: 83,312 countCalaveras County: 18,437 countColusa County: 7,512 countContra Costa County: 414,417 countDel Norte County: 9,522 countEl Dorado County: 76,185 countFresno County: 324,702 countGlenn County: 9,810 countHumboldt County: 54,922 countImperial County: 49,644 countInyo County: 8,040 countKern County: 284,931 countKings County: 44,052 countLake County: 26,940 countLassen County: 9,247 countLos Angeles County: 3,416,449 countMadera County: 45,379 countMarin County: 103,018 countMariposa County: 7,508 countMendocino County: 34,842 countMerced County: 86,055 countModoc County: 3,267 countMono County: 5,744 countMonterey County: 132,489 countNapa County: 49,763 countNevada County: 42,865 countOrange County: 1,082,960 countPlacer County: 157,954 countPlumas County: 8,054 countRiverside County: 775,335 countSacramento County: 571,057 countSan Benito County: 20,561 countSan Bernardino County: 674,915 countSan Diego County: 1,171,278 countSan Francisco County: 363,970 countSan Joaquin County: 245,250 countSan Luis Obispo County: 109,503 countSan Mateo County: 264,419 countSanta Barbara County: 149,608 countSanta Clara County: 659,353 countSanta Cruz County: 96,898 countShasta County: 71,232 countSierra County: 1,219 countSiskiyou County: 19,079 countSolano County: 157,512 countSonoma County: 190,998 countStanislaus County: 177,874 countSutter County: 33,292 countTehama County: 24,788 countTrinity County: 5,585 countTulare County: 143,195 countTuolumne County: 22,690 countVentura County: 280,360 countYolo County: 76,693 countYuba County: 28,635 count
  • Under 10K
  • 10K to 30K
  • 30K to 70K
  • 70K to 150K
  • 150K to 340K
  • 340K and over
Households, 2024, count. San Mateo County is outlined. Same source and period for every area shown. Source: U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

Definition

Number of households, which equals the number of occupied housing units. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

People living in group quarters, such as college dormitories, nursing homes and prisons, are not in households.

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How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B25003: occupied housing units (households) (Households, San Mateo County, 2021 to 2024) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat

MLA 9

American Community Survey 5-year estimates, table B25003: occupied housing units (households), Households, San Mateo County, 2021 to 2024. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Invokely, https://invokely.ai/en/households/san-mateo-county-california. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B25003: occupied housing units (households). Households, San Mateo County, 2021 to 2024. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Also distributed by Invokely, https://invokely.ai/en/households/san-mateo-county-california.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B25003: occupied housing units (households), Households, San Mateo County, 2021 to 2024 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat, via Invokely: https://invokely.ai/en/households/san-mateo-county-california (Accessed: 12 October 2026).

BibTeX
@misc{census_households_san_mateo_county_2024,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B25003: occupied housing units (households): Households, San Mateo County, 2021 to 2024}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/households/san-mateo-county-california. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary\_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B25003: occupied housing units (households): Households, San Mateo County, 2021 to 2024
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat
L2  - https://invokely.ai/en/households/san-mateo-county-california
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/households/san-mateo-county-california.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25003.dat. Retrieved 2026-10-12.
ER  -
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Questions

What is the households in San Mateo County?

Households in San Mateo County was 264,419 in 2024, according to the U.S. Census Bureau. That is unchanged from 2023. That is the 14th highest of 58 counties in 2024.

Where does this figure come from?

U.S. Census Bureau. American Community Survey 5-year estimates, table B25003: occupied housing units (households). Retrieved by Invokely on 2026-10-12.

What was the highest households in San Mateo County?

264,892 in 2021, the highest value since 2021 in this series.

Related statistics for San Mateo County

All statistics for San Mateo County | San Mateo County in figures