Castaic, CA Demographics
Castaic, CA is the 366th most populous of 1611 cities in California, with 18,937 residents across 7 square miles. That is about 2,608 people per square mile.
At the 2020 census
| Population | 18,937 |
|---|---|
| Land area | 7 sq mi |
| Density | 2,608 / sq mi |
Data: 2020 Decennial Census · land area from Census TIGER/Line
How Castaic, CA compares to the US
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About this page
City statistics cover the municipal boundary only, not the wider metro area.
Figures come from the 2020 census and the American Community Survey, compared against national averages.