CDP in Los Angeles County, California · 7.3 sq mi · 2,528 people per sq mi
About 18,000 people live in Castaic. The typical household earns $129,863, and the median resident is 37.9 years old.
2026 projection
From 18,479 in 2020
Poverty rate 5.06%
Men 38.4 · Women 37.6
2011–2026
18,355
2026 projection
0.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2011–2026
18,355
2026 projection
0.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 18,355 | -42 | 0.23% |
|---|---|---|---|
| 2025 | 18,397 | -82 | 0.22% |
| 2023 | 18,479 | -164 | 0.88% |
| 2022 | 18,643 | +626 | 3.47% |
| 2021 | 18,017 | -462 | 2.50% |
| 2020 | 18,479 | -921 | 4.75% |
| 2019 | 19,400 | +479 | 2.53% |
| 2018 | 18,921 | -378 | 1.96% |
| 2017 | 19,299 | -230 | 1.18% |
| 2016 | 19,529 | +160 | 0.83% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 180 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 20 residents
58% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 58% | 59% | 56% |
| Never married | 31% | 32% | 29% |
| Divorced | 8% | 6% | 9% |
| Widowed | 3% | 1% | 5% |
| Separated | 1% | 2% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau