91384 ZIP Code — Castaic, CA
Los Angeles County, California
ZIP code 91384 is located in Castaic, California, within Los Angeles County. It covers approximately 103.60 square miles and serves a population of 27,652 residents. This is a po box ZIP code in the Pacific (PT) timezone, served by area code 661/805.
About ZIP code 91384
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $645,600. Owner-occupancy is high at 85%, well above the national average.
Median household income is $127,416. The poverty rate of 4% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 33 minutes is near the national average.
Educational attainment is near the national average, with 32% of residents holding a bachelor's degree or higher.
27,652
population
103.60
sq mi land
PO Box
ZIP type
Pacific (PT)
timezone
91384 ZIP code map
Cities in ZIP code 91384
Below are the cities the US Postal Service accepts for ZIP code 91384. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Castaic | Acceptable |
| Castaic | Acceptable |
| Castaic | Preferred |
Nearby ZIP codes
91354 Valencia (7.1 mi)
91355 Valencia (7.7 mi)
91383 Santa Clarita (7.8 mi)
91350 Santa Clarita (10.3 mi)
91381 Stevenson Ranch (11.1 mi)
91351 Canyon Country (11.8 mi)
91382 Santa Clarita (12.1 mi)
93532 Lake Hughes (12.6 mi)
91390 Santa Clarita (13.2 mi)
93015 Fillmore (14.1 mi)
91387 Canyon Country (14.7 mi)
91321 Newhall (15.3 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 27,652 |
| Population density | 267 / sq mi |
| State FIPS | 06 |
| County FIPS | 037 |
| Geography | |
|---|---|
| Land area | 103.60 sq mi |
| Water area | 0.79 sq mi |
| Latitude | 34.5307 |
| Longitude | -118.6340 |
| Timezone | Pacific (PT) |
| Area code | 661/805 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 18.1% | 36.2% | 32.6% |
| $50k – $100k | 23.4% | 28.2% | 27.7% |
| $100k – $200k | 42.7% | 24.5% | 26.4% |
| Over $200k | 15.9% | 11.0% | 13.3% |
Demographics & statistics
27,652
Population
267
People per sq mi
35.1
Median age
$127,416
Median household income
$39,648
Per capita income
$645,600
Median home value
$1,788
Median monthly rent
84.9%
Home ownership
4.1%
Poverty rate
5.8%
Unemployment
6,180
Housing units
31.6%
Bachelor's or higher
Age distribution
Male
Female
888
Under 5
638
997
5–9
716
1,207
10–14
866
1,050
15–19
753
1,123
20–24
807
2,769
25–34
1,987
2,351
35–44
1,687
2,165
45–54
1,555
1,141
55–59
819
906
60–64
650
995
65–74
714
417
75–84
300
88
85+
63
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 6,449 | 23.3% |
| 18 and over | 21,203 | 76.7% |
| 65 and over | 2,577 | 9.3% |
| Median age | 35.1 years | |
Race & ethnicity
White
43.3%
Hispanic or Latino
20.6%
Two or more races
14.5%
Other race
9.7%
Asian
6.9%
Black or African American
3.9%
American Indian / Alaska Native
1.2%
| Group | Count | % |
|---|---|---|
| White | 15,078 | 43.3% |
| Hispanic or Latino | 7,168 | 20.6% |
| Two or more races | 5,046 | 14.5% |
| Other race | 3,373 | 9.7% |
| Asian | 2,392 | 6.9% |
| Black or African American | 1,343 | 3.9% |
| American Indian / Alaska Native | 413 | 1.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 18.1% | 36.2% | 32.6% |
| $50k – $100k | 23.4% | 28.2% | 27.7% |
| $100k – $200k | 42.7% | 24.5% | 26.4% |
| Over $200k | 15.9% | 11.0% | 13.3% |
Under $10k
2.1%
$10k–$15k
1.4%
$15k–$25k
3.3%
$25k–$35k
3.4%
$35k–$50k
5.1%
$50k–$75k
9.3%
$75k–$100k
9.1%
$100k–$150k
26.6%
$150k–$200k
16.4%
$200k+
23.4%
| Range | % of households |
|---|---|
| Under $10k | 2.1% |
| $10k–$15k | 1.4% |
| $15k–$25k | 3.3% |
| $25k–$35k | 3.4% |
| $35k–$50k | 5.1% |
| $50k–$75k | 9.3% |
| $75k–$100k | 9.1% |
| $100k–$150k | 26.6% |
| $150k–$200k | 16.4% |
| $200k+ | 23.4% |
| Median income | $127,416 |
Housing
Home values
Under $50k
1.2%
$50k–$100k
1.3%
$100k–$150k
1.6%
$150k–$200k
1.8%
$200k–$300k
2.3%
$300k–$500k
13.8%
$500k–$1M
70.9%
$1M+
7.2%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $645,600 |
| Median rent / month | $1,788 |
| Owner occupied | 84.9% |
| Renter occupied | 15.1% |
| Vacant | 2.0% |
| Single-family detached | 85.6% |
| Large apartment buildings | 5.8% |
| Mobile homes | 4.6% |
| Median rooms | 6.0 |
| Avg household size (owned) | 3.43 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 0.6% |
| 2000–2009 | 29.8% |
| 1990–1999 | 21.2% |
| 1980–1989 | 36.4% |
| 1970–1979 | 5.8% |
| 1960–1969 | 1.0% |
| 1950–1959 | 3.0% |
| 1940–1949 | 0.9% |
| 1939 or earlier | 1.4% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 1.6% |
| 1 bedroom | 3.0% |
| 2 bedrooms | 12.4% |
| 3 bedrooms | 41.5% |
| 4 bedrooms | 32.5% |
| 5+ bedrooms | 9.0% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 2.0% |
| 1 vehicle | 15.8% |
| 2 vehicles | 40.3% |
| 3 or more | 41.9% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 80.7% |
| Electricity | 15.5% |
| Propane / LP gas | 1.7% |
| Fuel oil | 0.2% |
| Wood | 0.3% |
| Solar | 1.0% |
| No fuel used | 0.3% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 4,907 | 69.1% |
| Cohabiting couple | 246 | 3.5% |
| Male householder, no spouse | 956 | 13.5% |
| Female householder, no spouse | 994 | 14.0% |
| Households with children under 18 | 3,078 | 43.3% |
| Households with seniors (65+) | 1,946 | 27.4% |
| Average household size | 3.31 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 45.6% | 27.9% |
| Married | 44.7% | 57.0% |
| Separated | 1.8% | 0.6% |
| Widowed | 1.0% | 7.1% |
| Divorced | 6.9% | 7.5% |
Education
Less than 9th grade
5.5%
Some HS, no diploma
9.9%
HS graduate
20.8%
Some college, no degree
23.0%
Associate's degree
9.3%
Bachelor's degree
22.6%
Graduate / professional
9.0%
| Metric | % |
|---|---|
| HS diploma or higher | 84.7% |
| Bachelor's or higher | 31.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 382 | 5.3% |
| Kindergarten | 294 | 4.1% |
| Elementary school | 2,896 | 40.5% |
| High school | 1,756 | 24.6% |
| College / grad school | 1,824 | 25.5% |
Employment
Industry of employment
Education & healthcare
22.0%
Professional & management
10.5%
Finance & real estate
9.8%
Manufacturing
9.2%
Public administration
8.3%
Retail trade
7.6%
Arts, food & hospitality
7.5%
Transportation & utilities
6.7%
Construction
5.8%
Information
4.4%
Other services
4.2%
Wholesale trade
3.4%
Agriculture & mining
0.6%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 43.6% |
| Service | 16.9% |
| Sales & office | 22.9% |
| Natural resources & construction | 7.6% |
| Production & transportation | 9.1% |
Employment type
| Type | % |
|---|---|
| Private sector | 72.2% |
| Government | 20.1% |
| Self-employed | 7.7% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 75.7% |
| Carpool | 12.4% |
| Public transit | 0.7% |
| Walk | 0.3% |
| Work from home | 9.7% |
| Other means | 1.2% |
| Avg commute (minutes) | 33.2 |
Poverty
All people
4.1%
Under 18 years
4.1%
18 and over
4.1%
Married-couple families
4.2%
Female-led households
4.1%
Income support
| Source | % of households |
|---|---|
| Social Security | 25.1% |
| Retirement income | 21.5% |
| Supplemental Security | 4.1% |
| Cash public assistance | 2.2% |
| Food stamps / SNAP | 4.4% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 27.4% |
| High blood pressure | 20.8% |
| High cholesterol | 23.5% |
| Diabetes | 6.4% |
| Heart disease | 3.3% |
| Stroke | 1.7% |
| Asthma | 8.4% |
| Arthritis | 12.4% |
| Kidney disease | 1.8% |
| Pulmonary disease | 3.7% |
| Cancer | 3.6% |
| Behavior / access | % |
|---|---|
| Smoking | 10.8% |
| Binge drinking | 23.0% |
| No physical activity | 16.5% |
| Less than 7 hrs sleep | 33.3% |
| Depression | 16.3% |
| Fair or poor health | 11.4% |
| Poor mental health | 15.2% |
| Poor physical health | 7.7% |
| No health insurance | 16.6% |
| Visited doctor (checkup) | 58.4% |
| Visited dentist | 63.1% |
| Cholesterol screening | 88.6% |
| Teeth loss | 7.9% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 837 | 4.0% |
| Disability | % |
|---|---|
| Any disability | 10.3% |
| Under 18 | 5.1% |
| 18–64 years | 8.3% |
| 65 and over | 35.3% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 76.3% |
| Public insurance | 26.0% |
| No insurance | 6.1% |
| Uninsured under 19 | 4.5% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 26,126 | 94.5% |
| Spanish | 2,527 | 9.7% |
| Other Indo-European | 1,719 | 6.6% |
| Asian & Pacific Islander | 140 | 0.5% |
| Other languages | 654 | 2.5% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 22,074 | 79.8% |
| Born in same state | 21,783 | 78.8% |
| Born in different state | 18,295 | 66.2% |
| Foreign born | 291 | 1.1% |
| Naturalized citizen | 5,578 | 20.2% |
| Not a US citizen | 3,890 | 69.7% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| French | 2,002 | 7.2% |
| Italian | 1,574 | 5.7% |
| Arab | 1,113 | 4% |
| Polish | 440 | 1.6% |
| Irish | 197 | 0.7% |
| Ancestry | Count | % |
|---|---|---|
| German | 184 | 0.7% |
| Dutch | 142 | 0.5% |
| English | 104 | 0.4% |
| Norwegian | 7 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 25.7% |
| Internet access | 99.0% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 91384
What city is ZIP code 91384 in?
ZIP code 91384 is primarily assigned to Castaic, California.
What county is ZIP code 91384 in?
ZIP code 91384 falls within Los Angeles County, California.
Is ZIP code 91384 mostly owner-occupied?
85% of occupied units in ZIP code 91384 are owner-occupied, well above the national average.
What is the median household income in ZIP code 91384?
The median household income in ZIP code 91384 is $127,416, above the national median of ~$75,000.
What is the typical home value in ZIP code 91384?
The median home value in ZIP code 91384 is $645,600.
What is the population of ZIP code 91384?
ZIP code 91384 has an estimated population of 27,652 residents, with a density of 267 people per square mile.
What timezone is ZIP code 91384 in?
ZIP code 91384 observes the PST timezone.