Northwest County, Greater Los Angeles, CA demographics:
population, income, and more

Total population
47,880
2.9% year-over-year change
Median household income
$135,621/yr
4.1% year-over-year change
Housing units
16,563
1.4% year-over-year change

Northwest County population

How many people live in Northwest County

Northwest County is home to 47,880 residents, according to the most recent Census data. Gender-wise, 48.8% of Northwest County locals are male, and 51.2% are female.

Total population
47,880
2.9% year-over-year change
Gender ratio
Male
48.8%
23,373
Female
51.2%
24,507
Value Percent YoY change
Male 23,373 48.8% 3.4%
Female 24,507 51.2% 2.4%
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 Northwest County is 42, with the population distributed as follows: about 18.4% are children under 15, then 12.3% are in the 15 to 24 age group. Adults between 25 and 44 make up 22.2% of the population, while another 33.5% fall into the 45 to 64 bracket. Finally, around 13.6% are 65 or older.

Median age
42
Age breakdown
Under 15
18.4%
15 to 24
12.3%
25 to 44
22.2%
45 to 64
33.5%
Over 65
13.6%
Value Percent YoY change
Under 15 8,826 18.4% 5.1%
15 to 24 5,872 12.3% 2.7%
25 to 44 10,621 22.2% 4.7%
45 to 64 16,036 33.5% 1.3%
Over 65 6,524 13.6% 1.1%
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 Northwest County, 74.9% of the population are US-born citizens, while 18.5% have gained naturalized citizenship. At the same time, 6.7% of residents are non-citizens. As for race, 53.4% of locals are Caucasian, 3.2% are African American and 18.1% have Asian roots. Another 1.7% are Indigenous American, 0.2% are Pacific Islanders, while 7.5% identify as another race. There’s also a share of 16% that includes residents with two or more races.

Citizenship
U.S.-born citizens
74.9%
Non-U.S.-born citizens
18.5%
Non-citizens
6.7%
Value Percent YoY change
U.S.-born citizens 35,847 74.9% -0.2%
Non-U.S.-born citizens 8,845 18.5% 5.4%
Non-citizens 3,188 6.7% 42.2%
Racial breakdown
White
53.4%
Black or African American
3.2%
American Indian and Alaska Native
1.7%
Asian
18.1%
Native Hawaiian and other Pacific Islander
0.2%
Two or more races
16%
Other
7.5%
Value Percent
White 25,554 53.4%
Black or African American 1,525 3.2%
American Indian and Alaska Native 814 1.7%
Asian 8,666 18.1%
Native Hawaiian and other Pacific Islander 74 0.2%
Two or more races 7,669 16%
Other 3,580 7.5%

Households in Northwest County

A peek inside Northwest County households

Northwest County has 16,016 households, with an average of 2 members in each. Of these, 78.4% are families, while the remaining 21.6% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
16,016
2.2% year-over-year change
Average people per household
2
Non-family households
3,461
Family households
12,555
Value Percent YoY change
Non-family households 3,461 21.6% 1.3%
Family households 12,555 78.4% 2.5%
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 Northwest County

The housing landscape of Northwest County

Northwest County's housing consists of 16,563 units, with 75.2% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 7.2% 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 1.6% of the housing landscape.

Housing units
16,563
1.4% year-over-year change
Housing types
Value Percent
1 unit, detached 12,456 75.2%
1 unit, attached 1,200 7.2%
2 units 128 0.8%
3 or 4 units 220 1.3%
5 to 9 units 675 4.1%
10 to 19 units 461 2.8%
20 to 49 units 459 2.8%
50 or more units 700 4.2%
Mobile home 265 1.6%
Homes built since 2020
610
235.2% year-over-year change

The age of buildings in Northwest County

In Northwest County, the median construction year is 1984. About 2.2% of homes were built before the 1940s, with another 1.4% going up by 1949. Most development happened in the second half of the 20th century. Then, 27.8% of homes were added from 2000 to 2009, 2.5% between 2010 and 2019, and 3.7% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 366 2.2% 3.1%
Built between 1940 and 1949 231 1.4% -13.5%
Built between 1950 and 1959 1,301 7.8% 1.2%
Built between 1960 and 1969 952 5.8% -1.4%
Built between 1970 and 1979 1,201 7.2% 4.2%
Built between 1980 and 1989 3,382 20.4% 7.0%
Built between 1990 and 1999 3,500 21.1% -9.5%
Built between 2000 and 2009 4,604 27.8% 0.2%
Built between 2010 and 2019 418 2.5% -16.4%
Built in 2020 or later 610 3.7% 235.2%
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.

Northwest County occupancy rates

Out of the 16,016 occupied housing units in Northwest County, 75% are owner-occupied, while 25% are lived in by tenants. Meanwhile, 3.3% of all homes on the local market sit vacant.

Occupied housing units
16,016
2.2% year-over-year change
Occupancy breakdown
Renter occupied
4,011
Owner occupied
12,005
Value Percent YoY
change
Renter occupied 4,011 25% -6.0%
Owner occupied 12,005 75% 5.3%
Unoccupied housing units
3.3%
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.

Northwest County housing costs

Housing costs in Northwest County come to a median of $2,785 per month, while tenants specifically pay a median gross rent of $2,422.

Median housing costs per month
$2,785/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 Northwest County
$2,422/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 Northwest County

Northwest County education at a glance

About 21.1% of the population in Northwest County went to high school, while 22.2% pursued college studies. Another 9.1% earned an associate degree and 28.6% hold a bachelor’s. Meanwhile, 16.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 911 2.5% -0.3%
High school diploma 7,680 21.1% -0.3%
College diploma 8,073 22.2% -1.9%
Associate degree 3,309 9.1% -10.9%
Bachelor's degree 10,427 28.6% 6.4%
Graduate degree 6,049 16.6% 17.2%
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 Northwest County

How much people earn in Northwest County

The average annual household income in Northwest County was $111,364 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +6.1% change from the previous year. At the same time, the median income stood at $135,621, reflecting a +4.1% shift over the same period.

Average household income in Northwest County
$111,364/year
6.1% year-over-year change
Median household income in Northwest County
$135,621/year
4.1% year-over-year change

Northwest County income by age

In Northwest County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $142,902. Those with someone between 45 and 64 in charge, often well established professionally, earn $161,209 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $42,854, while those led by someone over 65, many of whom may be retired, have about $81,007 in earnings. Overall, 94.8% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $42,854 0.8%
25 - 44 $142,902 2.5%
45 - 64 $161,209 9.2%
Over 65 $81,007 2.9%
Above poverty level
44,709
Below poverty level
2,460
Value Percent YoY
change
Above poverty level 44,709 94.8% 3.0%
Below poverty level 2,460 5.2% -0.0%

Employment in Northwest County

Workforce and job types in Northwest County

88.4% of the working population are employed in professional or administrative positions, while 11.6% are in hands-on or service-based jobs. Also, 14.3% run their own businesses, 58.9% are employed by private companies, and 18.6% work in the public sector.

Workforce demographics

White collar
19,583
Blue collar
2,558
Value Percent YoY change
White collar 19,583 88.4% 3.4%
Blue collar 2,558 11.6% 3.0%
Employer type
Self employees
14.3%
Private companies
58.9%
Governmental workers
18.6%
Not for profit companies
8.1%
Value Percent YoY change
Self employees 3,165 14.3% -1.5%
Private companies 13,049 58.9% 2.9%
Governmental workers 4,123 18.6% 7.9%
Not for profit companies 1,803 8.1% 5.7%

Transportation in Northwest County

How people get around in Northwest County

Commuting methods vary: 98.1% of residents travel by personal vehicle and 0.8% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 15,553 98.1% 0.1%
Taxicab 2 0% -33.3%
Bus or trolleybus 27 0.2% -50.9%
Railroad 48 0.3% -40.0%
Ferryboat 62 0.4% 17.0%
Motorcycle 34 0.2% -27.7%
Bicycle 1 0% N/A
Walk 132 0.8% 20.0%
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 Northwest County by zipcode?

Zipcode Population Number of households Median income Average income
91344 52,890 17,729 $119,345 $149,949
91381 22,582 7,553 $158,504 $198,574
91390 19,308 6,414 $151,897 $175,077
93532 2,930 1,019 $113,363 $116,948

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FAQs about Northwest County demographics 

What is the total population of Northwest County?

Northwest County has a total population of 47,880 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 +2.9% compared to a year ago.

What is the gender ratio in Northwest County?

The gender ratio in Northwest County is as follows:
  • 48.8% males (23,373 residents)
  • 51.2% females (24,507 residents)

What is the median age in Northwest County?

The median age in Northwest County is 42.

What is the age distribution of the population in Northwest County?

The age distribution in Northwest County is as follows:
  • Under 15: 18.4% (8,826 residents)
  • Ages 15-24: 12.3% (5,872 residents)
  • Ages 25-44: 22.2% (10,621 residents)
  • Ages 45-64: 33.5% (16,036 residents)
  • Over 65: 13.6% (6,524 residents)

What is the racial and ethnic makeup of Northwest County?

The racial and ethnic makeup of Northwest County is as follows:
  • White: 53.4% (25,554 residents)
  • Black or African American: 3.2% (1,525 residents)
  • American Indian and Alaska Native: 1.7% (814 residents)
  • Asian: 18.1% (8,666 residents)
  • Native Hawaiian and Other Pacific Islander: 0.2% (74 residents)
  • Two or More Races: 16% (7,669 residents)
  • Other: 7.5% (3,580 residents)

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

U.S.-born citizens represent 74.9% of the population in Northwest County.

How many housing units are there in Northwest County?

There are 16,563 housing units in Northwest County, reflecting a +1.4% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Northwest County has a total of 16,016 households, with an average of 2 people in each.

What is the median household income in Northwest County?

Northwest County has a median household income of $135,621, representing a +4.1% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Northwest County?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 88.4% (19,583 residents)
  • Blue-collar workers: 11.6% (2,558 residents)

Places of employment:
  • Self-employed: 14.3% (3,165 residents)
  • Private companies: 58.9% (13,049 residents)
  • Governmental workers: 18.6% (4,123 residents)
  • Not-for-profit companies: 8.1% (1,803 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