Castaic, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Castaic, California is 18,479 as of the 2023 American Community Survey, making it the 370th-largest city in California. The median household income is $132,153, the median home value is $710,400, and the median age is 37.2.
18,479
Population
2545
People / sq mi
$132,153
Median Income
$710,400
Median Home Value
Castaic covers 7.3 sq mi of land at 2545 people per square mile.
About Castaic, CA
Castaic is a city in California with a population of 18,479. It ranks #370 among cities in California by population. The median age is 37.2, younger than the national median. The population is 50.2% male and 49.8% female.
The median household income in Castaic is $132,153, above the US median of $74,580. 3.8% of residents live below the federal poverty level. Home values sit at a median of $710,400, with monthly rent averaging $1,751. The homeownership rate of 84.4% is higher than the national rate of 64.8%.
Educational attainment in Castaic reflects 41.4% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 12.5% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 31.1 minutes each way.
Race & Ethnicity
| White | 54.7% |
| Black or African American | 1.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.9% |
| Two or More Races | 0.0% |
Economy & Income
$132,153
Median Household Income
$50,338
Per Capita Income
3.8%
Poverty Rate
3.5%
Unemployment Rate
Housing
$710,400
Median Home Value
$1,751
Median Rent
84.4%
Owner-Occupied
Education
93.1%
High School+
41.4%
Bachelor's+
Commute
0.4%
Drive Alone
75.7%
Public Transit
12.5%
Work From Home
31.1 min
Avg Commute
Community Profile
12.1%
Foreign Born
68.0%
Non-English at Home
3.8%
Veterans
11.5%
With Disability
95.4%
Health Insurance
99.4%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 22.5% |
| Manufacturing | 9.8% |
| Information | 9.8% |
| Public Administration | 8.5% |
| Education, Health Care & Social Services | 8.2% |
| Finance, Insurance & Real Estate | 7.5% |
| Retail Trade | 6.3% |
| Transportation & Warehousing | 6.0% |
| Arts, Entertainment & Food Services | 4.9% |
| Construction | 4.1% |
| Agriculture & Mining | 0.7% |
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City rankings
Frequently Asked Questions
Castaic, California has a population of 18,479 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 370th-largest city in California.
The median household income in Castaic, California is $132,153, with 3.8% of residents living below the federal poverty level.
The median home value in Castaic, California is $710,400, with median monthly rent at $1,751 and a homeownership rate of 84.4%.
The median age in Castaic, California is 37.2 years. The population is 50.2% male and 49.8% female.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.