Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/ID/COUNTY/CASSIA

Cassia County, ID ZIP codes

There are 7 ZIP codes in Cassia County, ID, in 7 towns, from 83311 to 83346. The largest are 83318 (Burley), 83323 (Declo) and 83346 (Oakley). 1 more crosses into it from a neighbouring county: 83211.

The county seat is Burley.

ZIP codes
7
Partly in it
1 more
Towns
7
County seat
Burley
County FIPS
16031
State
Idaho
Population
25,483
Median household income
$70,830
Land area
2,566 sq mi
Metro area
Burley

Cassia County ZIP codes by town

Burley (county seat)
83318

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Cassia County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Cassia County.

Map of Cassia County ZIP codes

83311833128331883323833428334483346

The ZIP codes of Cassia County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Cassia County in numbers

About 25,483 people live in Cassia County, in 8,495 households, the 15th most populous of Idaho's 44 counties. The median household income is $70,830 a year, 9% below the Idaho median of $77,800 (US: $80,734). The median owner-occupied home is valued at $284,600 (32% below the Idaho median), and median gross rent is $1,000 a month. The median age is 33.2; 21.3% of adults 25 and over hold a bachelor's degree or higher (31.8% across Idaho); the average commute takes 18 minutes.

Population25,483Cassia25,483
Households8,495Cassia8,495
Median age33.2Cassia33.2Idaho37.3US 38.9
Median household income$70,830Cassia$70,830Idaho$77,800US $80,734
Median home value$284,600Cassia$284,600Idaho$418,600US $332,700
Median gross rent$1,000Cassia$1,000Idaho$1,238US $1,413
Bachelor's degree or higher21.3%Cassia21.3%Idaho31.8%US 35.7%
Mean commute17.9 minCassia17.9 minIdaho21.6 minUS 26.4 min
Population density10 / sq miCassia10 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Cassia County

Largest towns in Cassia County
TownZIP codesPopulation
Burley 1 11,958
Oakley 1 830
Declo 1 477
Albion 1 376
Malta 1 346
Almo 1 278
Murtaugh 1 129

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Cassia County.

Not sure you are in Cassia County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Cassia County, with figures

ZIP codes in Cassia County
ZIP City Type Population Median income Median home
83311 Albion , ID Standard 903 $101,167 $293,800
83312 Almo , ID Standard 278 $57,155 $435,500
83318 Burley , ID Standard 19,459 $71,282 $276,500
83323 Declo , ID Standard 1,984 $60,625 $339,900
83342 Malta , ID Standard 1,231 $56,818 $224,300
83344 Murtaugh , ID Standard 1,234 $65,417 $425,800
83346 Oakley , ID Standard 1,451 $70,114 $268,500

Cite this page

zipcodes.pro. “Cassia County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/id/county/cassia

Underlying data is public domain or openly licensed — sources, vintages and licences.