Castaic, CA demographics:
population, income, and more

Total population
17,999
-2.6% year-over-year change
Median household income
$129,863/yr
-1.7% year-over-year change
Housing units
5,865
-0.1% year-over-year change

Castaic population

How many people live in Castaic

Castaic is home to 17,999 residents, according to the most recent Census data. Gender-wise, 48.7% of Castaic locals are male, and 51.3% are female.

Total population
17,999
-2.6% year-over-year change
Gender ratio
Male
48.7%
8,768
Female
51.3%
9,231
Value Percent YoY change
Male 8,768 48.7% -5.5%
Female 9,231 51.3% 0.3%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Castaic is 38, with the population distributed as follows: about 20.6% are children under 15, then 12.7% are in the 15 to 24 age group. Adults between 25 and 44 make up 25.8% of the population, while another 28.5% fall into the 45 to 64 bracket. Finally, around 12.3% are 65 or older.

Median age
37.9
Age breakdown
Under 15
20.6%
15 to 24
12.7%
25 to 44
25.8%
45 to 64
28.5%
Over 65
12.3%
Value Percent YoY change
Under 15 3,714 20.6% -4.0%
15 to 24 2,290 12.7% -0.7%
25 to 44 4,651 25.8% -4.5%
45 to 64 5,135 28.5% -2.8%
Over 65 2,209 12.3% 2.6%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Castaic, 79.2% of the population are US-born citizens, while 15.9% have gained naturalized citizenship. At the same time, 4.9% of residents are non-citizens. As for race, 55.8% of locals are Caucasian, 2.2% are African American and 10.7% have Asian roots. There’s also a share of 20.2% that includes residents with two or more races.

Citizenship
U.S.-born citizens
79.2%
Non-U.S.-born citizens
15.9%
Non-citizens
4.9%
Value Percent YoY change
U.S.-born citizens 14,261 79.2% -1.0%
Non-U.S.-born citizens 2,860 15.9% -6.0%
Non-citizens 878 4.9% -15.3%
Racial breakdown
White
55.8%
Black or African American
2.2%
American Indian and Alaska Native
0.8%
Asian
10.7%
Native Hawaiian and other Pacific Islander
0%
Two or more races
20.2%
Other
10.3%
Value Percent
White 10,044 55.8%
Black or African American 394 2.2%
American Indian and Alaska Native 139 0.8%
Asian 1,927 10.7%
Two or more races 3,639 20.2%
Other 1,856 10.3%

Households in Castaic

A peek inside Castaic households

Castaic has 5,797 households, with an average of 3 members in each. Of these, 83.1% are families, while the remaining 16.9% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
5,797
-0.3% year-over-year change
Average people per household
3
Non-family households
982
Family households
4,815
Value Percent YoY change
Non-family households 982 16.9% 7.3%
Family households 4,815 83.1% -1.8%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Castaic

The housing landscape of Castaic

Castaic's housing consists of 5,865 units, with 84.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.1% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 3.1% of the housing landscape.

Housing units
5,865
-0.1% year-over-year change
Housing types
Value Percent
1 unit, detached 4,954 84.5%
1 unit, attached 67 1.1%
2 units 40 0.7%
5 to 9 units 177 3%
10 to 19 units 108 1.8%
20 to 49 units 219 3.7%
50 or more units 107 1.8%
Mobile home 182 3.1%
Boat, RV, van, etc. 11 0.2%
Homes built since 2020
0
% year-over-year change

The age of buildings in Castaic

In Castaic, the median construction year is 1992. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 40 0.7% -45.2%
Built between 1950 and 1959 114 1.9% 15.2%
Built between 1960 and 1969 32 0.6% 39.1%
Built between 1970 and 1979 231 3.9% -9.4%
Built between 1980 and 1989 2,276 38.8% -6.6%
Built between 1990 and 1999 1,081 18.4% -2.4%
Built between 2000 and 2009 2,026 34.5% 10.7%
Built between 2010 and 2019 65 1.1% 51.2%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Castaic occupancy rates

Out of the 5,797 occupied housing units in Castaic, 83.1% are owner-occupied, while 16.9% are lived in by tenants. Meanwhile, 1.2% of all homes on the local market sit vacant.

Occupied housing units
5,797
-0.3% year-over-year change
Occupancy breakdown
Renter occupied
980
Owner occupied
4,817
Value Percent YoY
change
Renter occupied 980 16.9% 8.2%
Owner occupied 4,817 83.1% -1.9%
Unoccupied housing units
1.2%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Castaic housing costs

Housing costs in Castaic come to a median of $2,903 per month, while tenants specifically pay a median gross rent of $1,770.

Median housing costs per month
$2,903/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Castaic
$1,770/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Castaic

Castaic education at a glance

About 22.5% of the population in Castaic went to high school, while 22.5% pursued college studies. Another 13% earned an associate degree and 27.1% hold a bachelor’s. Meanwhile, 11.5% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 452 3.4% 18.3%
High school diploma 3,001 22.5% -8.4%
College diploma 3,006 22.5% -5.5%
Associate degree 1,729 13% 8.2%
Bachelor's degree 3,615 27.1% -4.5%
Graduate degree 1,531 11.5% 3.0%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Castaic

How much people earn in Castaic

The average annual household income in Castaic was $153,114 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -2.4% change from the previous year. At the same time, the median income stood at $129,863, reflecting a -1.7% shift over the same period.

Average household income in Castaic
$153,114/year
-2.4% year-over-year change
Median household income in Castaic
$129,863/year
-1.7% year-over-year change

Castaic income by age

In Castaic, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $147,843. Those with someone between 45 and 64 in charge, often well established professionally, earn $155,405 overall. Overall, 95% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $147,843 3.2%
45 - 64 $155,405 0.5%
Over 65 $66,471 -8.7%
Above poverty level
16,825
Below poverty level
881
Value Percent YoY
change
Above poverty level 16,825 95% -3.0%
Below poverty level 881 5% 22.9%

Average renter income in Castaic

To get a better sense of what renters earn on average in Castaic, their median household income was $69,444 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 30.6%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$69,444
Rent-to-income ratio
30.6%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Castaic

Workforce and job types in Castaic

The job market in Castaic is powered by 8,962 working residents, spread across a range of industries and roles. 83.2% of the working population are employed in professional or administrative positions, while 16.8% are in hands-on or service-based jobs. Also, 8.4% run their own businesses, 62.9% are employed by private companies, and 20.7% work in the public sector.

Workforce demographics

Working population
8,962
-2.5% year-over-year change
White collar
7,454
Blue collar
1,508
Value Percent YoY change
White collar 7,454 83.2% -3.2%
Blue collar 1,508 16.8% 0.8%
Employer type
Self employees
8.4%
Private companies
62.9%
Governmental workers
20.7%
Not for profit companies
8.1%
Value Percent YoY change
Self employees 749 8.4% -3.4%
Private companies 5,635 62.9% -0.9%
Governmental workers 1,856 20.7% -5.5%
Not for profit companies 722 8.1% -5.7%
Unemployment rate
4.4%
-15.7% year-over-year change

Available workforce

The unemployment rate in Castaic stands at 4.4%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Castaic

How people get around in Castaic

In Castaic, the average commute time is 31 minutes. Commuting methods vary: 81% of residents travel by personal vehicle and 0.3% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
31 min
Means of transportation
Value Percent YoY change
Car 7,138 81% -5.6%
Bus or trolleybus 44 0.5% 15.8%
Motorcycle 46 0.5% 35.3%
Walk 27 0.3% -34.1%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Castaic by zipcode?

Zipcode Population Number of households Median income Average income
91384 26,478 7,124 $131,689 $150,443

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FAQs about Castaic demographics 

What is the total population of Castaic?

Castaic has a total population of 17,999 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -2.6% compared to a year ago.

What is the gender ratio in Castaic?

The gender ratio in Castaic is as follows:
  • 48.7% males (8,768 residents)
  • 51.3% females (9,231 residents)

What is the median age in Castaic?

The median age in Castaic is 37.9.

What is the age distribution of the population in Castaic?

The age distribution in Castaic is as follows:
  • Under 15: 20.6% (3,714 residents)
  • Ages 15-24: 12.7% (2,290 residents)
  • Ages 25-44: 25.8% (4,651 residents)
  • Ages 45-64: 28.5% (5,135 residents)
  • Over 65: 12.3% (2,209 residents)

What is the racial and ethnic makeup of Castaic?

The racial and ethnic makeup of Castaic is as follows:
  • White: 55.8% (10,044 residents)
  • Black or African American: 2.2% (394 residents)
  • American Indian and Alaska Native: 0.8% (139 residents)
  • Asian: 10.7% (1,927 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 20.2% (3,639 residents)
  • Other: 10.3% (1,856 residents)

What percentage of the population in Castaic are U.S.-born citizens?

U.S.-born citizens represent 79.2% of the population in Castaic.

How many housing units are there in Castaic?

There are 5,865 housing units in Castaic, reflecting a -0.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Castaic and what is the average household size?

Castaic has a total of 5,797 households, with an average of 3 people in each.

What is the median household income in Castaic?

Castaic has a median household income of $129,863, representing a -1.7% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Castaic?

The employment rate is 95.6% in Castaic, with a workforce of 8,962 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 83.2% (7,454 residents)
  • Blue-collar workers: 16.8% (1,508 residents)

Places of employment:
  • Self-employed: 8.4% (749 residents)
  • Private companies: 62.9% (5,635 residents)
  • Governmental workers: 20.7% (1,856 residents)
  • Not-for-profit companies: 8.1% (722 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025