Cardiff by The Sea, CA demographics:
population, income, and more

Total population
10,253
-5.6% year-over-year change
Median household income
$182,629/yr
10.6% year-over-year change
Housing units
4,416
2.0% year-over-year change

Cardiff by the Sea population

How many people live in Cardiff by the Sea

Cardiff by the Sea is home to 10,253 residents, according to the most recent Census data. Gender-wise, 53.1% of Cardiff by the Sea locals are male, and 46.9% are female.

Total population
10,253
-5.6% year-over-year change
Gender ratio
Male
53.1%
5,443
Female
46.9%
4,810
Value Percent YoY change
Male 5,443 53.1% -6.9%
Female 4,810 46.9% -4.2%
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 Cardiff by the Sea is 40, with the population distributed as follows: about 21% are children under 15, then 6.4% are in the 15 to 24 age group. Adults between 25 and 44 make up 29.6% of the population, while another 24.8% fall into the 45 to 64 bracket. Finally, around 18.2% are 65 or older.

Median age
40.4
Age breakdown
Under 15
21%
15 to 24
6.4%
25 to 44
29.6%
45 to 64
24.8%
Over 65
18.2%
Value Percent YoY change
Under 15 2,155 21% -8.7%
15 to 24 654 6.4% -22.3%
25 to 44 3,031 29.6% -7.2%
45 to 64 2,543 24.8% -2.8%
Over 65 1,870 18.2% 4.8%
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 Cardiff by the Sea, 84.2% of the population are US-born citizens, while 7.6% have gained naturalized citizenship. At the same time, 8.2% of residents are non-citizens. As for race, 74.2% of locals are Caucasian, 0.1% are African American and 3.2% have Asian roots. There’s also a share of 20.4% that includes residents with two or more races.

Citizenship
U.S.-born citizens
84.2%
Non-U.S.-born citizens
7.6%
Non-citizens
8.2%
Value Percent YoY change
U.S.-born citizens 8,637 84.2% -7.3%
Non-U.S.-born citizens 779 7.6% 3.7%
Non-citizens 837 8.2% 5.4%
Racial breakdown
White
74.2%
Black or African American
0.1%
American Indian and Alaska Native
0%
Asian
3.2%
Native Hawaiian and other Pacific Islander
0%
Two or more races
20.4%
Other
2.1%
Value Percent
White 7,612 74.2%
Black or African American 11 0.1%
Asian 328 3.2%
Two or more races 2,087 20.4%
Other 214 2.1%

Households in Cardiff by the Sea

A peek inside Cardiff by the Sea households

Cardiff by the Sea has 3,947 households, with an average of 3 members in each. Of these, 68.6% are families, while the remaining 31.4% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
3,947
-2.7% year-over-year change
Average people per household
3
Non-family households
1,239
Family households
2,708
Value Percent YoY change
Non-family households 1,239 31.4% -1.8%
Family households 2,708 68.6% -3.1%
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 Cardiff by the Sea

The housing landscape of Cardiff by the Sea

Cardiff by the Sea's housing consists of 4,416 units, with 57.9% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 22.3% 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 0.1% of the housing landscape.

Housing units
4,416
2.0% year-over-year change
Housing types
Value Percent
1 unit, detached 2,559 57.9%
1 unit, attached 985 22.3%
2 units 212 4.8%
3 or 4 units 337 7.6%
5 to 9 units 42 1%
10 to 19 units 30 0.7%
20 to 49 units 105 2.4%
50 or more units 141 3.2%
Mobile home 6 0.1%
Homes built since 2020
127
76.4% year-over-year change

The age of buildings in Cardiff by the Sea

In Cardiff by the Sea, the median construction year is 1977. About 1% of homes were built before the 1940s, with another 0.6% going up by 1949. Most development happened in the second half of the 20th century. Then, 5.8% of homes were added from 2000 to 2009, 3.4% between 2010 and 2019, and 2.9% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 44 1% 91.3%
Built between 1940 and 1949 26 0.6% -52.7%
Built between 1950 and 1959 592 13.4% -5.9%
Built between 1960 and 1969 521 11.8% -2.1%
Built between 1970 and 1979 1,520 34.4% 1.7%
Built between 1980 and 1989 774 17.5% 5.6%
Built between 1990 and 1999 406 9.2% 6.3%
Built between 2000 and 2009 255 5.8% -8.9%
Built between 2010 and 2019 151 3.4% 18.9%
Built in 2020 or later 127 2.9% 76.4%
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.

Cardiff by the Sea occupancy rates

Out of the 3,947 occupied housing units in Cardiff by the Sea, 62.4% are owner-occupied, while 37.6% are lived in by tenants. Meanwhile, 10.6% of all homes on the local market sit vacant.

Occupied housing units
3,947
-2.7% year-over-year change
Occupancy breakdown
Renter occupied
1,483
Owner occupied
2,463
Value Percent YoY
change
Renter occupied 1,483 37.6% -6.5%
Owner occupied 2,463 62.4% -0.3%
Unoccupied housing units
10.6%
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.

Cardiff by the Sea housing costs

Housing costs in Cardiff by the Sea come to a median of $3,120 per month, while tenants specifically pay a median gross rent of $3,247.

Median housing costs per month
$3,120/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 Cardiff by the Sea
$3,247/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 Cardiff by the Sea

Cardiff by the Sea education at a glance

About 7.5% of the population in Cardiff by the Sea went to high school, while 10.5% pursued college studies. Another 5% earned an associate degree and 36.5% hold a bachelor’s. Meanwhile, 33.7% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 532 6.9% -13.5%
High school diploma 579 7.5% -10.5%
College diploma 816 10.5% -20.4%
Associate degree 384 5% -4.5%
Bachelor's degree 2,828 36.5% -7.4%
Graduate degree 2,617 33.7% 10.9%
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 Cardiff by the Sea

How much people earn in Cardiff by the Sea

The average annual household income in Cardiff by the Sea was $223,093 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +7.4% change from the previous year. At the same time, the median income stood at $182,629, reflecting a +10.6% shift over the same period.

Average household income in Cardiff by the Sea
$223,093/year
7.4% year-over-year change
Median household income in Cardiff by the Sea
$182,629/year
10.6% year-over-year change

Cardiff by the Sea income by age

In Cardiff by the Sea, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $204,792. Those with someone between 45 and 64 in charge, often well established professionally, earn $208,975 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $76,000, while those led by someone over 65, many of whom may be retired, have about $114,605 in earnings. Overall, 85.3% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $76,000 15.7%
25 - 44 $204,792 12.3%
45 - 64 $208,975 13.0%
Over 65 $114,605 12.3%
Above poverty level
8,720
Below poverty level
1,508
Value Percent YoY
change
Above poverty level 8,720 85.3% -7.0%
Below poverty level 1,508 14.7% 2.2%

Employment in Cardiff by the Sea

Workforce and job types in Cardiff by the Sea

87.2% of the working population are employed in professional or administrative positions, while 12.8% are in hands-on or service-based jobs. Also, 25% run their own businesses, 58.7% are employed by private companies, and 7.5% work in the public sector.

Workforce demographics

White collar
4,661
Blue collar
683
Value Percent YoY change
White collar 4,661 87.2% -6.7%
Blue collar 683 12.8% -1.2%
Employer type
Self employees
25%
Private companies
58.7%
Governmental workers
7.5%
Not for profit companies
8.8%
Value Percent YoY change
Self employees 1,337 25% -11.9%
Private companies 3,134 58.7% -1.7%
Governmental workers 403 7.5% -17.8%
Not for profit companies 469 8.8% -4.3%

Transportation in Cardiff by the Sea

How people get around in Cardiff by the Sea

Commuting methods vary: 96.6% of residents travel by personal vehicle and 1.8% 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 3,603 96.6% -11.0%
Railroad 6 0.2% N/A
Motorcycle 20 0.5% -20.0%
Bicycle 33 0.9% 106.2%
Walk 67 1.8% -6.9%
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 Cardiff by the Sea by zipcode?

Zipcode Population Number of households Median income Average income
92007 11,100 4,273 $182,629 $223,103

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FAQs about Cardiff by the Sea demographics 

What is the total population of Cardiff by the Sea?

Cardiff by the Sea has a total population of 10,253 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 -5.6% compared to a year ago.

What is the gender ratio in Cardiff by the Sea?

The gender ratio in Cardiff by the Sea is as follows:
  • 53.1% males (5,443 residents)
  • 46.9% females (4,810 residents)

What is the median age in Cardiff by the Sea?

The median age in Cardiff by the Sea is 40.4.

What is the age distribution of the population in Cardiff by the Sea?

The age distribution in Cardiff by the Sea is as follows:
  • Under 15: 21% (2,155 residents)
  • Ages 15-24: 6.4% (654 residents)
  • Ages 25-44: 29.6% (3,031 residents)
  • Ages 45-64: 24.8% (2,543 residents)
  • Over 65: 18.2% (1,870 residents)

What is the racial and ethnic makeup of Cardiff by the Sea?

The racial and ethnic makeup of Cardiff by the Sea is as follows:
  • White: 74.2% (7,612 residents)
  • Black or African American: 0.1% (11 residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 3.2% (328 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 20.4% (2,087 residents)
  • Other: 2.1% (214 residents)

What percentage of the population in Cardiff by the Sea are U.S.-born citizens?

U.S.-born citizens represent 84.2% of the population in Cardiff by the Sea.

How many housing units are there in Cardiff by the Sea?

There are 4,416 housing units in Cardiff by the Sea, reflecting a +2.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Cardiff by the Sea and what is the average household size?

Cardiff by the Sea has a total of 3,947 households, with an average of 3 people in each.

What is the median household income in Cardiff by the Sea?

Cardiff by the Sea has a median household income of $182,629, representing a +10.6% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Cardiff by the Sea?

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

Job types:
  • White-collar workers: 87.2% (4,661 residents)
  • Blue-collar workers: 12.8% (683 residents)

Places of employment:
  • Self-employed: 25% (1,337 residents)
  • Private companies: 58.7% (3,134 residents)
  • Governmental workers: 7.5% (403 residents)
  • Not-for-profit companies: 8.8% (469 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