Cassia County, Idaho

Cassia County: County in Idaho, United States

About

Cassia County is a county located in the U.S. state of Idaho. As of the 2010 census, the population was 22,952 and a population density of 3 people per km². After 9 years in 2019 county had an estimated population of 24,030 inhabitants. Its county seat is Burley. The county was created 146 years ago in 1879.

Cassia County locator map
Location of Cassia County on Idaho map.

Quick Facts about Cassia County

Population : 24,030 (2019)
Country : United States of America
State : Idaho (United States)
Area : 6683 km2
Water as percent of area : 0.6%
Land as percent of area : 99.4%
Named for : Cassia Creek
Altitude : 7,884 feet / 2403 meters
Capital : Burley
Establishment : February 02, 1879
Time Zone : America/Boise
Local time : 02:46:06 (5th December 2025)
Density : 4 Pop. per km² as of 2019
Population growth : 4.49% (2010-2019)
Cassia County Courthouse Idaho image
Cassia County Courthouse Idaho
Cassia County Courthouse Idaho image
Cassia County Courthouse Idaho image

Geography

Cassia County is located at 42°17'2"N 113°36'1"W (42.2838700, -113.6003700). It has 3 neighbors: Jerome County, Minidoka County and Box Elder County.

Cassia County map

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The largest city of Cassia County is Burley with a population of 10,582. Other cities include, Oakley population 812, Declo population 369, Albion population 276 and Malta population 205. See all Cassia County cities & populated places.

Cassia County Populated Places

Cities, towns, neighborhoods & other populated places in Cassia County.

City Name Population Title
Burley 10,582 City in Idaho
Oakley 812 City in Idaho
Declo 369 City in Cassia County, Idaho, United States
Albion 276 City in Idaho, USA
Malta 205 City in Idaho, US

Cassia County has 3 neighbours.

  • Burley

Demographics

The population of Cassia County increased by 4.49% in 9 years.

Year Population % Change Method
2010 22,952 - census
2011 23,106 0.67% estimation process
2012 23,263 0.67% estimation process
2013 23,344 0.35% estimation process
2014 23,503 0.68% estimation process
2015 23,499 -0.02% estimation process
2016 23,479 -0.09% estimation process
2017 23,650 0.72% estimation process
2018 23,791 0.59% estimation process
2019 24,030 0.99% estimation process

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Idaho Other Counties (more counties)

County Name Population Title
Ada County 481,587 County in Idaho, United States
Canyon County 229,849 County in Idaho, United States
Boise 228,959 The capital of Idaho.
Kootenai County 165,697 County in Idaho, United States
Bonneville County 119,062 County in Idaho, United States
Meridian 114,161 The most populous city in Ada County, Idaho.
Nampa 99,277 The most populous city in Canyon County, Idaho.
Bannock County 87,808 County in Idaho, United States
Twin Falls County 86,878 County in Idaho, United States
Idaho Falls 62,888 The most populous city in Bonneville County, Idaho.
Caldwell 58,481 The most populous city in Canyon County, Idaho.
Pocatello 56,637 The most populous city in Bannock County, Idaho.
Coeur d'Alene 52,414 A city in Kootenai County, Idaho.
Twin Falls 50,197 The most populous city in Twin Falls County, Idaho.
Bingham County 46,811 County in Idaho, United States
Bonner County 45,739 County in Idaho, United States