San Geronimo, CA Demographics

A map of San Geronimo's Population by Race

San Geronimo, California has an estimated population of 583, a large increase from the 510 recorded in the 2020 Census. The population is 86.4% White, 9.9% Multiracial, 3.4% Hispanic, 0.2% Black, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of San Geronimo, with one dot drawn for each person counted by the Census, color-coded by race.

San Geronimo 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 Geronimo, that probability was 32.5% in 2020 and 24.2% in the most recent ACS estimates.

San Geronimo is ranked the 1182nd 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 Geronimo was ranked the 1218th most populous place in the 2020 Census.

San Geronimo's White Population

504 residents of San Geronimo, or 86.4% of the population, identify as White. The share of White residents in San Geronimo is significantly higher than in California overall, where 33.8% of the population is White. San Geronimo ranks 189th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Geronimo's White population has grown by an estimated 21.2%. White residents' share of San Geronimo's population has increased from 81.6% to 86.4%.

San Geronimo is more White than neighboring Woodacre (84.5% White), Lagunitas-Forest Knolls (65.5% White), Fairfax (80.3% White), and Sleepy Hollow (79.4% White). San Geronimo is less White than neighboring Nicasio (92.3% White).

San Geronimo's Black Population

1 residents of San Geronimo, or 0.2% of the population, identify as Black. The share of Black residents in San Geronimo is slightly lower than in California overall, where 5.2% of the population is Black. San Geronimo ranks 533rd statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Geronimo's Black population has declined by an estimated 87.5%. Black residents' share of San Geronimo's population has decreased from 1.6% to 0.2%.

San Geronimo is more Black than neighboring Woodacre (0% Black), and Nicasio (0% Black). San Geronimo is less Black than neighboring Lagunitas-Forest Knolls (3.6% Black), Fairfax (2% Black), and Sleepy Hollow (0.8% Black).

San Geronimo's Asian Population

0 residents of San Geronimo, or 0.0% of the population, identify as Asian. The share of Asian residents in San Geronimo is significantly lower than in California overall, where 15.3% of the population is Asian. San Geronimo ranks 1083rd statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Geronimo's Asian population has declined by an estimated 100.0%. Asian residents' share of San Geronimo's population has decreased from 1.2% to 0.0%.

San Geronimo is less Asian than neighboring Lagunitas-Forest Knolls (5.5% Asian), Nicasio (2.2% Asian), Fairfax (3.2% Asian), and Sleepy Hollow (0.5% Asian).

San Geronimo's Hispanic Population

20 residents of San Geronimo, or 3.4% of the population, identify as Hispanic. The share of Hispanic residents in San Geronimo is significantly lower than in California overall, where 40.2% of the population is Hispanic. San Geronimo ranks 1410th statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Geronimo's Hispanic population has declined by an estimated 47.4%. Hispanic residents' share of San Geronimo's population has decreased from 7.5% to 3.4%.

San Geronimo is less Hispanic than neighboring Woodacre (5.3% Hispanic), Lagunitas-Forest Knolls (17.7% Hispanic), Nicasio (5.5% Hispanic), Fairfax (6.8% Hispanic), and Sleepy Hollow (8.1% Hispanic).

San Geronimo's Native American/Other Population

0 residents of San Geronimo, 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 Geronimo is comparable to the share in California overall, where 1.2% of the population is Native American/Other. San Geronimo ranks 322nd statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Geronimo's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of San Geronimo's population has decreased from 2.4% to 0.0%.

San Geronimo is less Native American/Other than neighboring Fairfax (2% Native American/Other), and Sleepy Hollow (3.8% Native American/Other).

San Geronimo's Multiracial Population

58 residents of San Geronimo, or 9.9% of the population, identify as Multiracial. The share of Multiracial residents in San Geronimo is higher than in California overall, where 4.4% of the population is Multiracial. San Geronimo ranks 508th statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, San Geronimo's Multiracial population has grown by an estimated 93.3%. Multiracial residents' share of San Geronimo's population has increased from 5.9% to 9.9%.

San Geronimo is more Multiracial than neighboring Lagunitas-Forest Knolls (7.7% Multiracial), Nicasio (0% Multiracial), Fairfax (5.7% Multiracial), and Sleepy Hollow (7.4% Multiracial). San Geronimo is less Multiracial than neighboring Woodacre (10.1% 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.