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COUNTY

Cassia County

Idaho · 26,397 residents (2025 est.) · 2,565.61 sq mi
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#154Youngest by median ageof 3,14433.2
The short version

Cassia County has lower-than-average household income, with a median household income of $70,830. Population has grown 19% since 2000. 21% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has more than tripled since 2000, reaching $284,600. At a median age of 33.2, residents skew younger than the country as a whole. It sits in the top 10% of US counties for household income.

At a glance
Lower income
below the US median
US median: $82,259
Younger
median age 33.2
US median: 38.9
Less educated
21% hold a bachelor's degree
US average: 36%
Less affordable
home values up 96%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
25,483
+19%since 2000
from 21,416 in 2000
1990 – 2025
Population density
10 / sq mi
+20%since 2009
from 8 / sq mi in 2009
US average: 281
Median age
33.2
+7%since 2000
from 31.1 in 2000
US average: 38.9

PEP 2025 EST:26,397 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
19K21K23K24K26K1990201020202024Cassia County
202425K
1990201020202024
Age distribution, 2024
Under 57.8%(1,987)
US avg: 5.6%
5 to 98.7%(2,229)
US avg: 6%
10 to 148.4%(2,146)
US avg: 6.4%
15 to 198.4%(2,130)
US avg: 6.6%
20 to 247.6%(1,937)
US avg: 6.5%
25 to 3411.4%(2,912)
US avg: 13.7%
35 to 4412.8%(3,255)
US avg: 13.2%
45 to 5410.5%(2,664)
US avg: 12.2%
55 to 649.9%(2,530)
US avg: 12.7%
65 to 748.7%(2,227)
US avg: 10.2%
75 to 844.4%(1,114)
US avg: 5.1%
85 and over1.4%(352)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$70,830
+17%inflation adjusted, since 2000
from $33,322 in 2000
US average: $82,259
1990 – 2024
Per capita income
$32,041
+127%since 2000
from $14,087 in 2000
US average: $44,673
Households earning $100K+
47.4%
+31.3 ptssince 2009
from 16.1% in 2009
US average: 53.3%
Poverty rate
12.4%
−1.2 ptssince 2000
from 13.6% in 2000
US average: 12.5%
Income inequality (Gini)
0.442
Unchangedsince 2010
from 0.441 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade14.7%
US avg: 9.9%
Information12%
US avg: 10.8%
Agriculture, forestry, fishing11.3%
US avg: 1.6%
Construction10.4%
US avg: 1.2%
Wholesale trade8.5%
US avg: 6.9%
Finance & insurance5.7%
US avg: 5.9%
Professional, scientific, technical5.3%
US avg: 5.1%
Other services4.3%
US avg: 6.7%
Public administration3.6%
US avg: 4.8%
Transportation & warehousing2.8%
US avg: 2.2%
Arts, entertainment, food1.3%
US avg: 1.9%
Manufacturing0.8%
US avg: 0.4%
Education & health services0.5%
US avg: 0.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$284,600
+96%inflation adjusted, since 2000
from $79,800 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$1,000
+36%inflation adjusted, since 2000
from $403 in 2000
US average: $1,442
Owner-occupied
68.6%
−4.0 ptssince 2000
from 72.6% in 2000
31.4% rent
Vacancy rate
6.6%
−2.8 ptssince 2009
from 9.4% in 2009
US average: 10.0%
Owner cost-burdened
16.6%
−5.7 ptssince 2009
from 22.3% in 2009
US average: 22.9%
Renter cost-burdened
39.0%
+12.0 ptssince 2009
from 27.0% in 2009
US average: 47.4%
Afford Score
4.0
+49%since 2009
from 2.7 in 2009
2009 – 2024
Our index: median home value divided by median household income. Lower is more affordable.
Gentrification Score
80
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
RELATED:See current rent listings in Cassia County on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic79.3%(16,982)
Black0.1%(16)
Hispanic / Latino18.7%(4,013)
Asian0.4%(79)
Other0%
2024
White, non-Hispanic64.4%(16,401)
Black0.5%(118)
Hispanic / Latino30.1%(7,664)
Asian0.3%(67)
Other4.8%(1,233)
Diversity Score
62
+25%since 2009
from 49 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Segregation Score
21
−17%since 2020
from 25 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican26.7%(6,811)
Salvadoran0.8%(202)
Puerto Rican0.4%(110)
Spaniard0.4%(107)
Honduran0.2%(43)
Guatemalan0.1%(34)
Uruguayan0.1%(15)
Cuban0%(5)
Asian origin
Filipino0.1%(23)
Japanese0.1%(15)
Nepalese0.1%(13)
Burmese0%(10)
Chinese0%(6)
Pacific Islander origin
Samoan0.2%(44)
Fijian0%(3)
Tongan0%(1)
Ancestry
English22%(5,611)
German10.2%(2,597)
American7%(1,776)
Irish3.7%(954)
Danish3.6%(907)
Swedish2.5%(635)
Scottish2.3%(575)
Welsh1.3%(329)
Norwegian0.9%(221)
French0.8%(205)
Italian0.7%(171)
Scotch-Irish0.5%(137)
+ 14 more ancestry groups with data
Swiss0.5%(126)
Canadian0.5%(115)
Polish0.5%(115)
British0.4%(114)
Dutch0.4%(106)
Finnish0.1%(27)
Greek0.1%(22)
Portuguese0.1%(20)
Ethiopian0.1%(18)
Czech0.1%(15)
Slovak0.1%(14)
RANKED:Largest Mexican population · Largest English population · Largest German population · Largest American population · Largest Irish population
Section 05

Education

Bachelor's degree or higher
21.3%
+7.4 ptssince 2000
from 13.9% in 2000
US average: 35.6%
High school or higher
85.4%
+8.4 ptssince 2000
from 76.9% in 2000
US average: 89.6%
Graduate degree
6.6%
+1.8 ptssince 2000
from 4.8% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
17.9 min
+50%since 2000
from 11.9 min in 2000
US average: 26.5
Drive alone to work
78.4%
+2.1 ptssince 2009
from 76.3% in 2009
US average: 68.9%
Carpooled to work
9.3%
−1.8 ptssince 2009
from 11.1% in 2009
US average: 8.5%
Public transit
0.2%
−0.1 ptssince 2009
from 0.2% in 2009
US average: 3.2%
Worked from home
8.9%
+3.0 ptssince 2009
from 5.9% in 2009
US average: 15.0%
Walked to work
1.4%
−1.8 ptssince 2009
from 3.2% in 2009
US average: 2.4%
Biked to work
0.1%
−0.5 ptssince 2009
from 0.5% in 2009
US average: 0.4%
No vehicle available
4.6%
+0.2 ptssince 2009
from 4.4% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
2.4%
−6.4 ptssince 2011
from 8.8% in 2011
US average: 5.2%
Labor force participation
63.7%
+1.2 ptssince 2011
from 62.5% in 2011
US average: 63.5%
Self-employed
10.9%
−3.1 ptssince 2009
from 14.0% in 2009
US average: 13.1%
Management & professional
31.7%
−24.5 ptssince 2009
from 56.2% in 2009
US average: 42.5%
Section 08

People & community

Male
51.4%
+0.9 ptssince 2009
from 50.5% in 2009
Female
48.6%
−0.9 ptssince 2009
from 49.5% in 2009
Foreign born
10.3%
+0.1 ptssince 2009
from 10.2% in 2009
US average: 14.1%
Veterans
4.2%
−45.7 ptssince 2009
from 49.9% in 2009
US average: 6.2%
With a disability
14.0%
+0.8 ptssince 2012
from 13.2% in 2012
US average: 13.3%
Uninsured
11.7%
−67.1 ptssince 2013
from 78.8% in 2013
US average: 8.4%
Broadband at home
88.1%
+8.5 ptssince 2017
from 79.6% in 2017
US average: 91.0%
English only at home
77.7%
−0.1 ptssince 2016
from 77.8% in 2016
US average: 77.7%
Spanish at home
21.2%
+0.3 ptssince 2016
from 20.9% in 2016
US average: 13.6%
Marital status
Men 15+
Never married31%(3,049)
Married60.5%(5,945)
Widowed1.3%(129)
Divorced7.1%(697)
Women 15+
Never married23.8%(2,212)
Married59.2%(5,508)
Widowed7.7%(715)
Divorced9.3%(866)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Drill deeper

Places similar to Cassia County

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Pop 26,362
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Pop 27,218
Del Norte County
Pop 26,410
White County
Pop 29,802
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Head to head

Compare Cassia County to nearby counties

CASSIA COUNTY VS
Minidoka County
Income$70,377−1%
Home value$262,600−8%
Population22,911−13%
SEE FULL COMPARISON →
CASSIA COUNTY VS
Jerome County
Income$71,724+1%
Home value$271,800−4%
Population26,362same
SEE FULL COMPARISON →
CASSIA COUNTY VS
Power County
Income$61,146−14%
Home value$212,900−25%
Population8,246−69%
SEE FULL COMPARISON →
CASSIA COUNTY VS
Twin Falls County
Income$67,409−5%
Home value$337,900+19%
Population97,539+270%
SEE FULL COMPARISON →
Frequently asked

How many people live in Cassia County, Idaho?

Cassia County, Idaho has about 25,483 residents according to the 2024 American Community Survey.

What is the median household income in Cassia County, Idaho?

The typical household in Cassia County, Idaho earns about $70,830 a year. Half of households make more than that, and half make less.

Is Cassia County, Idaho expensive?

In Cassia County, Idaho, the median home is worth about $284,600, and the typical rent is about $1,000 a month.

How educated are people in Cassia County, Idaho?

About 21.3% of adults age 25 and over in Cassia County, Idaho hold a bachelor's degree or higher.

What is the poverty rate in Cassia County, Idaho?

About 12.4% of people in Cassia County, Idaho live below the federal poverty line.

Has Cassia County, Idaho grown since 1990?

Yes, Cassia County, Idaho has grown since 1990. The population has added about 5,951 residents, a change of about 30 percent over that period.

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Explore from here

6 census tracts
Census Tract 9505Census Tract 9503Census Tract 9504Census Tract 9501Census Tract 9502Census Tract 9506
7 ZIP codes
ZIP 83318ZIP 83323ZIP 83346ZIP 83344ZIP 83342ZIP 83311ZIP 83312
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →