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zipcodes.pro — CITY/CA/CASTAIC

Castaic ZIP codes, California

Castaic, CA has 2 ZIP codes (91384 and 91310) and area code 661. The largest is 91384.

USPS city name
2 ZIP codes
Population
17,999
Area code
661

NANPA lists no telephone rate centre for Castaic itself, so these are the area codes of the nearest one, Santa Clarita (7.9 miles). A town on an area-code boundary can differ from its neighbour.

Castaic in numbers

About 17,999 people live in Castaic, in 5,797 households. The median household income is $129,863 a year, 31% above the California median of $99,122 (US: $80,734). The median owner-occupied home is valued at $792,000 (8% above the California median), and median gross rent is $1,770 a month. The median age is 37.9; 41.6% of adults 25 and over hold a bachelor's degree or higher (37.1% across California); the average commute takes 31 minutes.

Population17,999Castaic17,999
Households5,797Castaic5,797
Median age37.9Castaic37.9California37.9US 38.9
Median household income$129,863Castaic$129,863California$99,122US $80,734
Median home value$792,000Castaic$792,000California$734,700US $332,700
Median gross rent$1,770Castaic$1,770California$2,036US $1,413
Bachelor's degree or higher41.6%Castaic41.6%California37.1%US 35.7%
Mean commute31.0 minCastaic31.0 minCalifornia28.7 minUS 26.4 min
Population density2,479 / sq miCastaic2,479 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Castaic CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Castaic

ZIP codes with the USPS city name Castaic
ZIP City Type Population Median income Median home
91384 Castaic , CA Standard 26,478 $131,689 $767,300
91310 Castaic , CA No street area — — —

Map of Castaic ZIP codes

9138491310

The ZIP codes of Castaic, CA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Castaic

The nearest larger towns are Stevenson Ranch (20,990 people, 6.8 mi), Santa Clarita (230,221 people, 8.6 mi) and Simi Valley (125,634 people, 16 mi).

Towns near Castaic
TownPopulationDistance
Val Verde 3,291 2.9 mi
Stevenson Ranch 20,990 6.8 mi
Santa Clarita 230,221 8.6 mi
Simi Valley 125,634 16.0 mi
Fillmore 16,816 17.1 mi
San Fernando 23,632 17.2 mi
Agua Dulce 2,828 17.8 mi
Moorpark 35,854 19.2 mi
Oak Park 13,757 21.6 mi
Santa Rosa Valley 2,780 22.2 mi
Calabasas 22,669 23.8 mi
Agoura Hills 19,721 23.9 mi
Thousand Oaks 125,205 24.0 mi
Acton 7,880 25.6 mi

More nearby: every ZIP code in Los Angeles County · California ZIP codes

Cite this page

zipcodes.pro. “Castaic, CA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ca/castaic

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