Petrolia, CA demographics:
population, income, and more

Total population
230
-5.7% year-over-year change
Median household income
$51,719/yr
0.9% year-over-year change
Housing units
203
5.2% year-over-year change

Petrolia population

How many people live in Petrolia

Petrolia is home to 230 residents, according to the most recent Census data. Gender-wise, 53% of Petrolia locals are male, and 47% are female.

Total population
230
-5.7% year-over-year change
Gender ratio
Male
53%
122
Female
47%
108
Value Percent YoY change
Male 122 53% 8.9%
Female 108 47% -18.2%
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

Adults between 25 and 44 make up 17% of the population, while another 33% fall into the 45 to 64 bracket. Finally, around 36.5% are 65 or older.

Median age
50.6
Age breakdown
Under 15
13.5%
15 to 24
0%
25 to 44
17%
45 to 64
33%
Over 65
36.5%
Value Percent YoY change
Under 15 31 13.5% -13.9%
25 to 44 39 17% 14.7%
45 to 64 76 33% 28.8%
Over 65 84 36.5% -25.7%
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

At the same time, 6.5% of residents are non-citizens. There’s also a share of 7.4% that includes residents with two or more races.

Citizenship
U.S.-born citizens
93.5%
Non-U.S.-born citizens
0%
Non-citizens
6.5%
Value Percent YoY change
U.S.-born citizens 215 93.5% -4.0%
Non-citizens 15 6.5% 7.1%
Racial breakdown
White
78.3%
Black or African American
0%
American Indian and Alaska Native
12.6%
Asian
1.7%
Native Hawaiian and other Pacific Islander
0%
Two or more races
7.4%
Other
0%
Value Percent
White 180 78.3%
American Indian and Alaska Native 29 12.6%
Asian 4 1.7%
Two or more races 17 7.4%

Households in Petrolia

A peek inside Petrolia households

Petrolia has 125 households, with an average of 2 members in each. Of these, 36.8% are families, while the remaining 63.2% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
125
-5.3% year-over-year change
Average people per household
2
Non-family households
79
Family households
46
Value Percent YoY change
Non-family households 79 63.2% 6.8%
Family households 46 36.8% -20.7%
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 Petrolia

The housing landscape of Petrolia

Petrolia's housing consists of 203 units, with 89.2% being detached single-family homes ideal for those wanting space. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 9.4% of the housing landscape.

Housing units
203
5.2% year-over-year change
Housing types
Value Percent
1 unit, detached 181 89.2%
5 to 9 units 3 1.5%
Mobile home 19 9.4%
Homes built since 2020
% year-over-year change

The age of buildings in Petrolia

In Petrolia, the median construction year is 1973. About 13.3% of homes were built before the 1940s, with another 9.4% going up by 1949. 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 27 13.3% 0.0%
Built between 1940 and 1949 19 9.4% 171.4%
Built between 1950 and 1959 27 13.3% -20.6%
Built between 1960 and 1969 3 1.5% 0.0%
Built between 1970 and 1979 79 38.9% 43.6%
Built between 1990 and 1999 12 5.9% -7.7%
Built between 2000 and 2009 17 8.4% 30.8%
Built between 2010 and 2019 19 9.4% -5.0%
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.

Petrolia occupancy rates

Out of the 125 occupied housing units in Petrolia, 69.6% are owner-occupied, while 30.4% are lived in by tenants. Meanwhile, 38.4% of all homes on the local market sit vacant.

Occupied housing units
125
-5.3% year-over-year change
Occupancy breakdown
Renter occupied
38
Owner occupied
87
Value Percent YoY
change
Renter occupied 38 30.4% 8.6%
Owner occupied 87 69.6% -10.3%
Unoccupied housing units
38.4%
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.

Petrolia housing costs

Median housing costs per month
$1,214/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.

Education in Petrolia

Petrolia education at a glance

About 19.6% of the population in Petrolia went to high school, while 50.2% pursued college studies. Another 5.5% earned an associate degree and 12.1% hold a bachelor’s. Meanwhile, 12.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
High school diploma 39 19.6% 2.6%
College diploma 100 50.2% 2.0%
Associate degree 11 5.5% -38.9%
Bachelor's degree 24 12.1% 26.3%
Graduate degree 25 12.6% -21.9%
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 Petrolia

How much people earn in Petrolia

The average annual household income in Petrolia was $55,665 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2.6% change from the previous year. At the same time, the median income stood at $51,719, reflecting a +0.9% shift over the same period.

Average household income in Petrolia
$55,665/year
2.6% year-over-year change
Median household income in Petrolia
$51,719/year
0.9% year-over-year change

Petrolia income by age

Those with someone between 45 and 64 in charge, often well established professionally, earn $36,875 overall. Overall, 72.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
45 - 64 $36,875 26.2%
Over 65 $72,500 3.8%
Above poverty level
167
Below poverty level
63
Value Percent YoY
change
Above poverty level 167 72.6% -2.9%
Below poverty level 63 27.4% -12.5%

Employment in Petrolia

Workforce and job types in Petrolia

58.4% of the working population are employed in professional or administrative positions, while 41.6% are in hands-on or service-based jobs. Also, 36.3% run their own businesses, 38.9% are employed by private companies, and 16.8% work in the public sector.

Workforce demographics

White collar
66
Blue collar
47
Value Percent YoY change
White collar 66 58.4% -9.6%
Blue collar 47 41.6% 80.8%
Employer type
Self employees
36.3%
Private companies
38.9%
Governmental workers
16.8%
Not for profit companies
8%
Value Percent YoY change
Self employees 41 36.3% 13.9%
Private companies 44 38.9% 37.5%
Governmental workers 19 16.8% 0.0%
Not for profit companies 9 8% -25.0%

Transportation in Petrolia

How people get around in Petrolia

Means of transportation
Value Percent YoY change
Car 65 100% -8.4%
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 Petrolia by zipcode?

Zipcode Population Number of households Median income Average income
95558 230 125 $51,719 $63,741

Explore more communities

FAQs about Petrolia demographics 

What is the total population of Petrolia?

Petrolia has a total population of 230 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 -5.7% compared to a year ago.

What is the gender ratio in Petrolia?

The gender ratio in Petrolia is as follows:
  • 53% males (122 residents)
  • 47% females (108 residents)

What is the median age in Petrolia?

The median age in Petrolia is 50.6.

What is the age distribution of the population in Petrolia?

The age distribution in Petrolia is as follows:
  • Under 15: 13.5% (31 residents)
  • Ages 15-24: 0% ( residents)
  • Ages 25-44: 17% (39 residents)
  • Ages 45-64: 33% (76 residents)
  • Over 65: 36.5% (84 residents)

What is the racial and ethnic makeup of Petrolia?

The racial and ethnic makeup of Petrolia is as follows:
  • White: 78.3% (180 residents)
  • Black or African American: 0% ( residents)
  • American Indian and Alaska Native: 12.6% (29 residents)
  • Asian: 1.7% (4 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 7.4% (17 residents)
  • Other: 0% ( residents)

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

U.S.-born citizens represent 93.5% of the population in Petrolia.

How many housing units are there in Petrolia?

There are 203 housing units in Petrolia, reflecting a +5.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Petrolia has a total of 125 households, with an average of 2 people in each.

What is the median household income in Petrolia?

Petrolia has a median household income of $51,719, representing a +0.9% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Petrolia?

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

Job types:
  • White-collar workers: 58.4% (66 residents)
  • Blue-collar workers: 41.6% (47 residents)

Places of employment:
  • Self-employed: 36.3% (41 residents)
  • Private companies: 38.9% (44 residents)
  • Governmental workers: 16.8% (19 residents)
  • Not-for-profit companies: 8% (9 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