Castaic, California Demographics & Population 2026
During the 2020–2024 ACS period, Castaic, California had a total population of 17,999, the 374th largest community in California, with a median household income of $129,863, which is 31% higher than the state average. The poverty rate is 5.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 31% above the state average — one of the wealthiest communities in California.
Castaic Quick Facts
How Castaic Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 18,479 | 17,999 | -2.6% |
| Median household income | $132,153 | $129,863 | -1.7% |
| Median home value | $710,400 | $792,000 | +11.5% |
How Castaic Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 70 | National average: 61
Education
Educational Attainment (Adults 25+)
Castaic Rankings in California
Explore California Rankings
Other Cities in Los Angeles County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Los Angeles | 3,857,263 | $81,939 | 16.6% | $921,200 |
| Long Beach | 455,548 | $87,430 | 14.8% | $806,600 |
| Santa Clarita | 230,221 | $123,062 | 7.4% | $784,700 |
| Glendale | 190,748 | $88,393 | 12.9% | $1,102,300 |
| Lancaster | 169,169 | $81,511 | 15.6% | $446,600 |
| Palmdale | 164,634 | $81,770 | 15.7% | $471,000 |
| Pomona | 147,943 | $79,479 | 14.3% | $593,800 |
| Torrance | 142,130 | $116,217 | 7.8% | $1,074,700 |
| Pasadena | 136,969 | $105,192 | 13.3% | $1,093,300 |
| East Los Angeles | 111,647 | $68,741 | 17.3% | $643,100 |
Cities Similar to Castaic
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Pinole | 18,761 | $127,717 | $718,600 | 38.6% | 6.9% |
| Truckee | 17,066 | $130,462 | $947,900 | 60.8% | 8.9% |
| Rosedale | 18,877 | $135,966 | $608,900 | 41.2% | 6.4% |
| Coronado | 19,015 | $134,534 | $2,000,000+ | 65.5% | 4.7% |
| La Crescenta-Montrose | 19,660 | $130,000 | $1,207,100 | 56.8% | 5.1% |
Population Overview
Castaic is a small city located in California, within Los Angeles County. The total population is 17,999. It ranks as the 374th most populous out of 1,570 Census-designated places in California.
Age Demographics
The median age in Castaic is 37.9 years. This is about the same as the state median of 37.9 years.
Economy, Income & Housing
The median household income in Castaic is $129,863. This is 31% higher than the state median of $99,122. It is also 61% higher than the national median of $80,734. The poverty rate stands at 5.1%. This is 58% lower than the state poverty rate of 12.0%. The unemployment rate is 4.4%. This is 33% lower than the state rate of 6.6%. The median home value is $792,000. Housing costs are 8% higher than the state median of $734,700. The home-value-to-income ratio of 6.1x suggests that housing affordability is a significant concern for many residents. 83.1% of occupied housing units are owner-occupied. This homeownership rate is 49% higher than the state average of 55.9%.
Race & Ethnicity
Castaic is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Hispanic or Latino residents account for 36.3%. The Black or African American population (2.2%) is well below the state average of 5.2%.
Education
41.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 12% higher than the state rate of 37.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.5%.
Data Sources & Methodology
All demographic data for Castaic, California is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against California state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,570 Census-designated places in California. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Castaic, California?
Castaic, California has a population of 17,999 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Castaic, CA?
The median household income in Castaic is $129,863, which is 61% higher than the national median of $80,734.
What is the poverty rate in Castaic, CA?
The poverty rate in Castaic is 5.1%. This means approximately 909 residents live below the federal poverty line.
What is the racial makeup of Castaic, California?
Castaic's population is 43.9% White, 2.2% Black, 36.3% Hispanic/Latino, and 10.3% Asian.
What is the median home value in Castaic, CA?
The median home value in Castaic is $792,000. The home-value-to-income ratio is 6.1x.
How educated is Castaic, California?
41.6% of adults (25+) in Castaic hold a bachelor's degree or higher, and 12.8% hold a graduate or professional degree.