Cassia County, ID demographics:
population, income, and more

Total population
25,483
1.3% year-over-year change
Median household income
$70,830/yr
5.7% year-over-year change
Housing units
9,096
1.2% year-over-year change

Cassia County population

How many people live in Cassia County

Cassia County is home to 25,483 residents, according to the most recent Census data. Gender-wise, 51.4% of Cassia County locals are male, and 48.6% are female.

Total population
25,483
1.3% year-over-year change
Gender ratio
Male
51.4%
13,086
Female
48.6%
12,397
Value Percent YoY change
Male 13,086 51.4% 1.2%
Female 12,397 48.6% 1.3%
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 Cassia County is 33, with the population distributed as follows: about 25% are children under 15, then 16% are in the 15 to 24 age group. Adults between 25 and 44 make up 24.2% of the population, while another 20.4% fall into the 45 to 64 bracket. Finally, around 14.5% are 65 or older.

Median age
33.2
Age breakdown
Under 15
25%
15 to 24
16%
25 to 44
24.2%
45 to 64
20.4%
Over 65
14.5%
Value Percent YoY change
Under 15 6,362 25% -0.6%
15 to 24 4,067 16% 7.3%
25 to 44 6,167 24.2% -1.6%
45 to 64 5,194 20.4% -1.2%
Over 65 3,693 14.5% 7.0%
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 Cassia County, 89.1% of the population are US-born citizens, while 4% have gained naturalized citizenship. At the same time, 6.9% of residents are non-citizens. As for race, 69.4% of locals are Caucasian, 0.5% are African American and 0.3% have Asian roots. There’s also a share of 13.3% that includes residents with two or more races.

Citizenship
U.S.-born citizens
89.1%
Non-U.S.-born citizens
4%
Non-citizens
6.9%
Value Percent YoY change
U.S.-born citizens 22,697 89.1% 2.4%
Non-U.S.-born citizens 1,028 4% -10.8%
Non-citizens 1,758 6.9% -5.1%
Racial breakdown
White
69.4%
Black or African American
0.5%
American Indian and Alaska Native
1.8%
Asian
0.3%
Native Hawaiian and other Pacific Islander
0%
Two or more races
13.3%
Other
14.8%
Value Percent
White 17,679 69.4%
Black or African American 118 0.5%
American Indian and Alaska Native 456 1.8%
Asian 67 0.3%
Native Hawaiian and other Pacific Islander 4 0%
Two or more races 3,397 13.3%
Other 3,762 14.8%

Households in Cassia County

A peek inside Cassia County households

Cassia County has 8,495 households, with an average of 3 members in each. Of these, 75.7% are families, while the remaining 24.3% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
8,495
3.1% year-over-year change
Average people per household
3
Non-family households
2,064
Family households
6,431
Value Percent YoY change
Non-family households 2,064 24.3% 3.3%
Family households 6,431 75.7% 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 Cassia County

The housing landscape of Cassia County

Cassia County's housing consists of 9,096 units, with 79% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.8% 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 7.4% of the housing landscape.

Housing units
9,096
1.2% year-over-year change
Housing types
Value Percent
1 unit, detached 7,186 79%
1 unit, attached 160 1.8%
2 units 379 4.2%
3 or 4 units 125 1.4%
5 to 9 units 249 2.7%
10 to 19 units 164 1.8%
20 to 49 units 118 1.3%
Mobile home 678 7.4%
Boat, RV, van, etc. 37 0.4%
Homes built since 2020
178
32.8% year-over-year change

The age of buildings in Cassia County

In Cassia County, the median construction year is 1975. About 15.3% of homes were built before the 1940s, with another 5.4% going up by 1949. Most development happened in the second half of the 20th century. Then, 6.9% of homes were added from 2000 to 2009, 8.8% between 2010 and 2019, and 2% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 1,393 15.3% 6.7%
Built between 1940 and 1949 495 5.4% 2.3%
Built between 1950 and 1959 824 9.1% -6.2%
Built between 1960 and 1969 917 10.1% -2.2%
Built between 1970 and 1979 1,880 20.7% 8.1%
Built between 1980 and 1989 944 10.4% 8.3%
Built between 1990 and 1999 1,044 11.5% -8.6%
Built between 2000 and 2009 624 6.9% -10.1%
Built between 2010 and 2019 797 8.8% -1.1%
Built in 2020 or later 178 2% 32.8%
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.

Cassia County occupancy rates

Out of the 8,495 occupied housing units in Cassia County, 68.6% are owner-occupied, while 31.4% are lived in by tenants. Meanwhile, 6.6% of all homes on the local market sit vacant.

Occupied housing units
8,495
3.1% year-over-year change
Occupancy breakdown
Renter occupied
2,665
Owner occupied
5,830
Value Percent YoY
change
Renter occupied 2,665 31.4% 7.8%
Owner occupied 5,830 68.6% 1.1%
Unoccupied housing units
6.6%
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.

Cassia County housing costs

Housing costs in Cassia County come to a median of $950 per month, while tenants specifically pay a median gross rent of $1,000.

Median housing costs per month
$950/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 Cassia County
$1,000/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 Cassia County

Cassia County education at a glance

About 37.9% of the population in Cassia County went to high school, while 26.5% pursued college studies. Another 10.4% earned an associate degree and 13% hold a bachelor’s. Meanwhile, 5.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 1,145 6.5% 5.6%
High school diploma 6,678 37.9% -2.4%
College diploma 4,669 26.5% 3.0%
Associate degree 1,824 10.4% 10.5%
Bachelor's degree 2,297 13% 6.6%
Graduate degree 991 5.6% -5.1%
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 Cassia County

How much people earn in Cassia County

The average annual household income in Cassia County was $92,485 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +4.2% change from the previous year. At the same time, the median income stood at $70,830, reflecting a +5.6% shift over the same period.

Average household income in Cassia County
$92,485/year
4.2% year-over-year change
Median household income in Cassia County
$70,830/year
5.7% year-over-year change

Cassia County income by age

In Cassia County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $75,439. Those with someone between 45 and 64 in charge, often well established professionally, earn $92,900 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $58,333, while those led by someone over 65, many of whom may be retired, have about $55,405 in earnings. Overall, 87.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $58,333 -8.5%
25 - 44 $75,439 4.4%
45 - 64 $92,900 18.9%
Over 65 $55,405 5.4%
Above poverty level
21,676
Below poverty level
3,068
Value Percent YoY
change
Above poverty level 21,676 87.6% -0.9%
Below poverty level 3,068 12.4% 22.8%

Employment in Cassia County

Workforce and job types in Cassia County

The job market in Cassia County is powered by 11,620 working residents, spread across a range of industries and roles. 65.1% of the working population are employed in professional or administrative positions, while 34.9% are in hands-on or service-based jobs. Also, 11.9% run their own businesses, 73% are employed by private companies, and 12.1% work in the public sector.

Workforce demographics

Working population
11,620
-1.8% year-over-year change
White collar
7,564
Blue collar
4,056
Value Percent YoY change
White collar 7,564 65.1% 2.6%
Blue collar 4,056 34.9% -9.1%
Employer type
Self employees
11.9%
Private companies
73%
Governmental workers
12.1%
Not for profit companies
3.1%
Value Percent YoY change
Self employees 1,378 11.9% -9.5%
Private companies 8,477 73% 0.0%
Governmental workers 1,409 12.1% -9.7%
Not for profit companies 356 3.1% 29.4%
Unemployment rate
2.4%
-6.2% year-over-year change

Available workforce

The unemployment rate in Cassia County stands at 2.4%, 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 Cassia County

How people get around in Cassia County

In Cassia County, the average commute time is 18 minutes. Commuting methods vary: 87.7% of residents travel by personal vehicle and 1.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
18 min
0.6% year-over-year change
Means of transportation
Value Percent YoY change
Car 9,932 87.7% -3.8%
Bus or trolleybus 19 0.2% -9.5%
Motorcycle 21 0.2% -32.3%
Bicycle 10 0.1% -23.1%
Walk 164 1.4% 13.1%
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 Cassia County by zipcode?

Zipcode Population Number of households Median income Average income
83211 6,743 2,289 $65,483 $78,303
83311 903 236 $101,167 $98,756
83312 278 110 $57,155 $62,882
83318 19,459 6,676 $71,282 $94,724
83323 1,984 578 $60,625 $83,702
83342 1,231 408 $56,818 $71,463
83344 1,234 379 $65,417 $83,916
83346 1,451 487 $70,114 $89,101
83350 12,671 4,600 $61,806 $80,570

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FAQs about Cassia County demographics 

What is the total population of Cassia County?

Cassia County has a total population of 25,483 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 +1.3% compared to a year ago.

What is the gender ratio in Cassia County?

The gender ratio in Cassia County is as follows:
  • 51.4% males (13,086 residents)
  • 48.6% females (12,397 residents)

What is the median age in Cassia County?

The median age in Cassia County is 33.2.

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

The age distribution in Cassia County is as follows:
  • Under 15: 25% (6,362 residents)
  • Ages 15-24: 16% (4,067 residents)
  • Ages 25-44: 24.2% (6,167 residents)
  • Ages 45-64: 20.4% (5,194 residents)
  • Over 65: 14.5% (3,693 residents)

What is the racial and ethnic makeup of Cassia County?

The racial and ethnic makeup of Cassia County is as follows:
  • White: 69.4% (17,679 residents)
  • Black or African American: 0.5% (118 residents)
  • American Indian and Alaska Native: 1.8% (456 residents)
  • Asian: 0.3% (67 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (4 residents)
  • Two or More Races: 13.3% (3,397 residents)
  • Other: 14.8% (3,762 residents)

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

U.S.-born citizens represent 89.1% of the population in Cassia County.

How many housing units are there in Cassia County?

There are 9,096 housing units in Cassia County, reflecting a +1.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Cassia County has a total of 8,495 households, with an average of 3 people in each.

What is the median household income in Cassia County?

Cassia County has a median household income of $70,830, representing a +5.7% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Cassia County?

The employment rate is 97.6% in Cassia County, with a workforce of 11,620 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 65.1% (7,564 residents)
  • Blue-collar workers: 34.9% (4,056 residents)

Places of employment:
  • Self-employed: 11.9% (1,378 residents)
  • Private companies: 73% (8,477 residents)
  • Governmental workers: 12.1% (1,409 residents)
  • Not-for-profit companies: 3.1% (356 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