San Marino, CA Demographics

A map of San Marino's Population by Race

San Marino, California has an estimated population of 12,216, a slight decrease from the 12,513 recorded in the 2020 Census. The population is 68.1% Asian, 21.8% White, 5.3% Hispanic, 4.6% Multiracial, 0.1% Black, and 0.0% Native American/Other. This demographic dot map shows the population of San Marino, with one dot drawn for each person counted by the Census, color-coded by race.

San Marino has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than California overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In San Marino, that probability was 54.9% in 2020 and 48.4% in the most recent ACS estimates.

San Marino is ranked the 447th most populous place in California, out of 1,618 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). San Marino was ranked the 445th most populous place in the 2020 Census.

San Marino's White Population

2,666 residents of San Marino, or 21.8% of the population, identify as White. The share of White residents in San Marino is considerably lower than in California overall, where 33.8% of the population is White. San Marino ranks 1213th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Marino's White population has declined by an estimated 23.1%. White residents' share of San Marino's population has decreased from 27.7% to 21.8%.

San Marino is more White than neighboring San Gabriel (9.6% White), East San Gabriel (14.2% White), and Alhambra (9% White). San Marino is less White than neighboring San Pasqual (43.4% White), and East Pasadena (27.8% White).

San Marino's Black Population

15 residents of San Marino, or 0.1% of the population, identify as Black. The share of Black residents in San Marino is lower than in California overall, where 5.2% of the population is Black. San Marino ranks 1085th statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Marino's Black population has declined by an estimated 74.1%. Black residents' share of San Marino's population has remained roughly unchanged at 0.1%.

San Marino is less Black than neighboring San Pasqual (1.1% Black), San Gabriel (1.4% Black), East San Gabriel (1.4% Black), East Pasadena (3.3% Black), and Alhambra (2.4% Black).

San Marino's Asian Population

8,318 residents of San Marino, or 68.1% of the population, identify as Asian. The share of Asian residents in San Marino is significantly higher than in California overall, where 15.3% of the population is Asian. San Marino ranks 13th statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Marino's Asian population has grown by an estimated 9.7%. Asian residents' share of San Marino's population has increased from 60.6% to 68.1%.

San Marino is more Asian than neighboring San Pasqual (30.4% Asian), San Gabriel (59.5% Asian), East San Gabriel (55.3% Asian), East Pasadena (32% Asian), and Alhambra (50.7% Asian).

San Marino's Hispanic Population

653 residents of San Marino, or 5.3% of the population, identify as Hispanic. The share of Hispanic residents in San Marino is significantly lower than in California overall, where 40.2% of the population is Hispanic. San Marino ranks 1438th statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Marino's Hispanic population has declined by an estimated 26.5%. Hispanic residents' share of San Marino's population has decreased from 7.1% to 5.3%.

San Marino is less Hispanic than neighboring San Pasqual (18.2% Hispanic), San Gabriel (26% Hispanic), East San Gabriel (26.4% Hispanic), East Pasadena (34.1% Hispanic), and Alhambra (34.9% Hispanic).

San Marino's Native American/Other Population

0 residents of San Marino, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in San Marino is comparable to the share in California overall, where 1.2% of the population is Native American/Other. San Marino ranks 1502nd statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Marino's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of San Marino's population has remained roughly unchanged at 0.0%.

San Marino is less Native American/Other than neighboring San Gabriel (1.5% Native American/Other), East San Gabriel (0.1% Native American/Other), East Pasadena (0.5% Native American/Other), and Alhambra (0.7% Native American/Other).

San Marino's Multiracial Population

564 residents of San Marino, or 4.6% of the population, identify as Multiracial. The share of Multiracial residents in San Marino is comparable to the share in California overall, where 4.4% of the population is Multiracial. San Marino ranks 999th statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Marino's Multiracial population has grown by an estimated 16.5%. Multiracial residents' share of San Marino's population has increased from 3.9% to 4.6%.

San Marino is more Multiracial than neighboring San Gabriel (2% Multiracial), East San Gabriel (2.7% Multiracial), East Pasadena (2.2% Multiracial), and Alhambra (2.3% Multiracial). San Marino is less Multiracial than neighboring San Pasqual (6.9% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.