Data / Population / San Marino, CA

Population in San Marino, CA

Population in San Marino, CA was 11,964 in 2025, according to the U.S. Census Bureau. That is down 0.8% from 2024. That is the 354th highest of 376 cities in 2025.

2025, persons11,964
Change on 2024-0.8%
Rank354th of 376Cities in California ranked
Series high12,4712020
Series low11,9642025

Next release: Friday, 14 May 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Get an email when a new figure is out or this one is revised.

Population in San Marino, CA, 2020 to 2025

11.8K12K12.2K12.4K12.6K2020202120222023202420252020: 12,471 persons2021: 12,255 persons2022: 12,125 persons2023: 12,078 persons2024: 12,061 persons2025: 11,964 persons11.8K12K12.2K12.4K12.6K2020202220252020: 12,471 persons2021: 12,255 persons2022: 12,125 persons2023: 12,078 persons2024: 12,061 persons2025: 11,964 persons
persons. Source: U.S. Census Bureau, Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Retrieved 2026-10-12, published 2026-05-14.
All 6 values
Periodpersons
202511,964
202412,061
202312,078
202212,125
202112,255
202012,471

Compared with California and United States

Place2025
San Marino, CA11,964
California39,355,309
United States341,784,857

Rankings

Definition

Resident population. United States: Census Bureau population estimates for 1 July.

More on how it is measured
  • Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón).
  • Norway: Statistics Norway, 1 January.
  • Iceland and its municipalities: Statistics Iceland, 1 January.
  • United Kingdom regions and local authorities: Office for National Statistics estimates for 30 June.
  • Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
  • UN World Population Prospects estimates for 1 July cover the years before 1960 and the areas the World Bank does not publish, such as Taiwan.

The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. 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). Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals) (Population, San Marino, CA, 2020 to 2025) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/

MLA 9

Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals), Population, San Marino, CA, 2020 to 2025. U.S. Census Bureau, 14 May 2026, https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Invokely, https://invokely.ai/en/population/san-marino-ca. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Population, San Marino, CA, 2020 to 2025. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Also distributed by Invokely, https://invokely.ai/en/population/san-marino-ca.

Harvard

U.S. Census Bureau (2026) Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals), Population, San Marino, CA, 2020 to 2025 [Dataset]. Available at: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/, via Invokely: https://invokely.ai/en/population/san-marino-ca (Accessed: 12 October 2026).

BibTeX
@misc{census_population_san_marino_ca_2025,
  author = {{U.S. Census Bureau}},
  title = {{Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals): Population, San Marino, CA, 2020 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/population/san-marino-ca. Publisher attribution: U.S. Census Bureau. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals): Population, San Marino, CA, 2020 to 2025
PY  - 2026
DA  - 2026/05/14
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/
L2  - https://invokely.ai/en/population/san-marino-ca
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/population/san-marino-ca.
N1  - Publisher attribution: U.S. Census Bureau. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest population in San Marino, CA? Cite the source.
get_value {"indicator":"population","place":"us-place-0668224"}
GET https://invokely.ai/api/v1/value?indicator=population&place=us-place-0668224

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the population in San Marino, CA?

Population in San Marino, CA was 11,964 in 2025, according to the U.S. Census Bureau. That is down 0.8% from 2024. That is the 354th highest of 376 cities in 2025.

Where does this figure come from?

U.S. Census Bureau. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Retrieved by Invokely on 2026-10-12.

What was the highest population in San Marino, CA?

12,471 in 2020, the highest value since 2020 in this series.

Population elsewhere in California

Related statistics for San Marino, CA

All statistics for San Marino, CA | San Marino, CA in figures