Castaic, CA Demographics

A map of Castaic's Population by Race

Castaic, California has an estimated population of 17,999, a decrease from the 18,937 recorded in the 2020 Census. The population is 43.9% White, 36.3% Hispanic, 10.2% Asian, 6.1% Multiracial, 2.2% Black, and 1.3% Native American/Other. This demographic dot map shows the population of Castaic, with one dot drawn for each person counted by the Census, color-coded by race.

Castaic has become slightly more racially diverse since the 2020 Census. It is 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 Castaic, that probability was 65.2% in 2020 and 66.1% in the most recent ACS estimates.

Castaic is ranked the 374th 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). Castaic was ranked the 366th most populous place in the 2020 Census.

Castaic's White Population

7,903 residents of Castaic, or 43.9% of the population, identify as White. The share of White residents in Castaic is considerably higher than in California overall, where 33.8% of the population is White. Castaic ranks 956th statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castaic's White population has declined by an estimated 14.2%. White residents' share of Castaic's population has decreased from 48.6% to 43.9%.

Castaic is more White than neighboring Val Verde (22.1% White), Stevenson Ranch (40.4% White), Santa Clarita (41.2% White), and Piru (8.6% White). Castaic is less White than neighboring Hasley Canyon (66.9% White).

Castaic's Black Population

394 residents of Castaic, or 2.2% of the population, identify as Black. The share of Black residents in Castaic is slightly lower than in California overall, where 5.2% of the population is Black. Castaic ranks 310th statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castaic's Black population has declined by an estimated 34.3%. Black residents' share of Castaic's population has decreased from 3.2% to 2.2%.

Castaic is more Black than neighboring Hasley Canyon (0% Black), and Piru (1.5% Black). Castaic is less Black than neighboring Val Verde (4.7% Black), Stevenson Ranch (3.6% Black), and Santa Clarita (4.3% Black).

Castaic's Asian Population

1,844 residents of Castaic, or 10.2% of the population, identify as Asian. The share of Asian residents in Castaic is lower than in California overall, where 15.3% of the population is Asian. Castaic ranks 286th statewide in terms of Asian residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castaic's Asian population has declined by an estimated 9.4%. Asian residents' share of Castaic's population has decreased from 10.8% to 10.2%.

Castaic is more Asian than neighboring Hasley Canyon (2.8% Asian), Val Verde (3.9% Asian), and Piru (0.5% Asian). Castaic is less Asian than neighboring Stevenson Ranch (27.1% Asian), and Santa Clarita (12% Asian).

Castaic's Hispanic Population

6,530 residents of Castaic, or 36.3% of the population, identify as Hispanic. The share of Hispanic residents in Castaic is slightly lower than in California overall, where 40.2% of the population is Hispanic. Castaic ranks 619th statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castaic's Hispanic population has grown by an estimated 10.9%. Hispanic residents' share of Castaic's population has increased from 31.1% to 36.3%.

Castaic is more Hispanic than neighboring Hasley Canyon (21.1% Hispanic), and Stevenson Ranch (20.5% Hispanic). Castaic is less Hispanic than neighboring Val Verde (65.2% Hispanic), and Piru (88.5% Hispanic).

Castaic's Native American/Other Population

227 residents of Castaic, or 1.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Castaic is comparable to the share in California overall, where 1.2% of the population is Native American/Other. Castaic ranks 821st statewide in terms of Native American/Other residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castaic's Native American/Other population has remained roughly the same. Native American/Other residents' share of Castaic's population has remained roughly unchanged at 1.3%.

Castaic is more Native American/Other than neighboring Val Verde (0.8% Native American/Other), Santa Clarita (1% Native American/Other), and Piru (0.9% Native American/Other). Castaic is less Native American/Other than neighboring Hasley Canyon (7.6% Native American/Other), and Stevenson Ranch (1.7% Native American/Other).

Castaic's Multiracial Population

1,101 residents of Castaic, or 6.1% of the population, identify as Multiracial. The share of Multiracial residents in Castaic is comparable to the share in California overall, where 4.4% of the population is Multiracial. Castaic ranks 682nd statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Castaic's Multiracial population has grown by an estimated 12.6%. Multiracial residents' share of Castaic's population has increased from 5.2% to 6.1%.

Castaic is more Multiracial than neighboring Hasley Canyon (1.6% Multiracial), Val Verde (3.3% Multiracial), Santa Clarita (5.1% Multiracial), and Piru (0% Multiracial). Castaic is less Multiracial than neighboring Stevenson Ranch (6.7% 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.