Cassia County

Cassia County Cassia County, Idaho was created on February 20, 1879, by an act of territorial legislation. Cassia County is a county located in the U.S. state of Idaho.

As of the 2000 Census the county had a population of 21,416 (2008 estimate: 21,348). The county seat and largest city is Burley. Cassia County was created by the Idaho Territorial Legislature on February 20, 1879, by a partition of Owyhee County, with the county seat at Albion. A western portion became Twin Falls County in 1907. The county assumed its present boundaries when an eastern portion bec

ame Power County on January 30, 1913. The county seat was moved to Burley in 1918. The county was named for Cassia Creek, which in turn was named either for John Cazier, a member of the Mormon Battalion and an emigrant train captain, or for a plant found in the area.

It’s the last week of early voting for the May 19, 2026 Primary Election. Stop by the Courthouse (1459 Overland Ave, Bur...
05/11/2026

It’s the last week of early voting for the May 19, 2026 Primary Election. Stop by the Courthouse (1459 Overland Ave, Burley), Monday through Friday from 8:30 a.m. to 5:00 p.m.

Preview your ballot at www.cassia.gov/sample-ballots

Don't forget, today at 5 pm is your last chance to pre-register to vote at www.VoteIdaho.gov and save time at the polls....
05/08/2026

Don't forget, today at 5 pm is your last chance to pre-register to vote at www.VoteIdaho.gov and save time at the polls. It's also your last chance to request an absentee ballot before the May 19 Primary Election!

Early voting for the May 19, 2026 Primary Election starts today. We are open Monday through Friday, 8:30 a.m. to 5:00 p....
05/04/2026

Early voting for the May 19, 2026 Primary Election starts today. We are open Monday through Friday, 8:30 a.m. to 5:00 p.m., at the Courthouse, 1459 Overland Ave, Burley.

To preview your ballot, visit www.cassia.gov/sample-ballots

Request your absentee ballot by May 8, 2026, at VoteIdaho.gov for the May 19 Primary Election.
04/29/2026

Request your absentee ballot by May 8, 2026, at VoteIdaho.gov for the May 19 Primary Election.

Get ready for the May 19, 2026 Primary Election! Visit VoteIdaho.gov to register, check your info, view your ballot, or ...
04/22/2026

Get ready for the May 19, 2026 Primary Election! Visit VoteIdaho.gov to register, check your info, view your ballot, or request an absentee ballot.

The May 19 Primary is coming up quickly! Don’t wait. Check deadlines, make your plan, and head to VoteIdaho.gov for regi...
04/15/2026

The May 19 Primary is coming up quickly! Don’t wait. Check deadlines, make your plan, and head to VoteIdaho.gov for registration, sample ballots, and polling information. 🗳️

04/07/2026

4/17/26 Update: This position has been filled. Cassia County has an opening for the position of Deputy Court Clerk in the Cassia County Clerk’s Office. Application forms and job description may be found at www.cassia.gov/employment-opportunities

02/23/2026

Filing for the 2026 election season starts Monday. 🗳️

NEW this year: All candidates file online at VoteIdaho.gov — no trip to the Capitol required.

📅 Feb 23–27: Federal, Statewide & Judicial
📅 Mar 2–13: County & Local (separate window)

Whether you file online or visit our office, we’re ready to help.

Update: This position has been filled. Cassia County has an opening for the position of Administrative Assistant in the ...
12/29/2025

Update: This position has been filled. Cassia County has an opening for the position of Administrative Assistant in the Cassia County Assessor’s Office. Application forms and job description may be found at www.cassia.gov/employment-opportunities

Address

1459 Overland Avenue
Burley, ID
83318

Opening Hours

Monday 8:30am - 5pm
Tuesday 8:30am - 5pm
Wednesday 8:30am - 5pm
Thursday 8:30am - 5pm
Friday 8:30am - 5pm

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