Cassia County

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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 became 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 National Voter Registration Day! Take 30 seconds to check your registration status, or register online at VoteIdaho...
09/15/2026

It’s National Voter Registration Day! Take 30 seconds to check your registration status, or register online at VoteIdaho.gov

09/18/2026 Update: This position has been filled. Cassia County Treasurer’s Office has a job opening for a Part-Time Dep...
09/08/2026

09/18/2026 Update: This position has been filled. Cassia County Treasurer’s Office has a job opening for a Part-Time Deputy position. Information can be found at www.cassia.gov/employment-opportunities

07/01/2026 Update: This position has been filled. Cassia County has an opening for the position of Deputy Clerk - Electi...
06/15/2026

07/01/2026 Update: This position has been filled. Cassia County has an opening for the position of Deputy Clerk - Elections and Social Services Assistant in the Cassia County Clerk’s Office. Application forms and job description may be found at www.cassia.gov/employment-opportunities

06/03/2026 Update: This position has been filled. Cassia County has an opening for the position of Administrative Assist...
05/28/2026

06/03/2026 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

Polls are open from 8 a.m. to 8 p.m. Find your polling place and view your sample ballot: www.cassia.gov/elections
05/19/2026

Polls are open from 8 a.m. to 8 p.m. Find your polling place and view your sample ballot: www.cassia.gov/elections

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

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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