Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
Idaho County
Cassia County, Idaho
City of Rocks National Reserve and the California Trail - from the City of Rocks National Reserve (the extraordinary granite spire landscape near Oakley - where 2.5-billion-year-old granite monoliths rise from the high desert floor in a labyrinthine city of stone - was one of the most described landmarks on the California Trail, where emigrants scratched their names in axle grease on the Register Rock and marveled at the stone city they passed through on their way to California) and Cassia County's significant potato and dairy production in the Magic Valley's eastern agricultural corridor.
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
What do you need to do?
Tell us your goal and we'll guide you step-by-step to the right office, forms, and official resources.
Office: Cassia County Sheriff’s Office – 129 E. 14th Street, Burley, ID 83318 | (208) 878-9327; Sheriff elected 2024.
Notes: For an active emergency, call 911.
Roads & Utilities
ROADS & TRANSPORTATION
Roads: I-84 serves Burley, the county seat and largest city, next to the Snake River, part of the “Mini-Cassia” area with neighboring Minidoka County and the third-largest city in Idaho’s Magic Valley region.
Notes: Cassia County was created from Owyhee County on February 20, 1879, originally seated at Albion; an eastern portion split off to form Power County in 1913, and the county seat moved to Burley in 1918. The county is named for Cassia Creek, itself named either for John Cazier, a Mormon Battalion member and emigrant train captain, or for a native plant. Burley was founded in 1905, named for David Ellsworth Burley, a passenger agent for the Oregon Short Line Railroad who conceived the town’s development.
Business & Permits
BUILDING & PERMITS
Office: Cassia County Courthouse – Burley, ID.
Notes: Cassia County holds genuine national significance in Oregon Trail and geological history. The Oregon Trail ran along the county’s northern border, while the California Trail split off nearby at the “parting of the ways” where the Raft and Snake Rivers converge; approximately 230 miles of authentic emigrant wagon-train routes cross the county. The City of Rocks National Reserve (also called the “Silent City of Rocks”), a National Historic Landmark since 1964 and National Natural Landmark since 1974, protects granite spires and exposed granitic batholith rock as old as 2.5 billion years – among the oldest exposed rock formations in North America – and was a well-documented resting point for thousands of 1860s pioneers heading to Oregon or California. Nearby Castle Rocks State Park (1,692 acres) offers additional dramatic rock-climbing terrain. The historic Albion State Normal School campus, the original county seat’s centerpiece, remains a local landmark and now houses a museum.
Veterans Services
VETERANS SERVICES
Office: Cassia County Veterans Services – confirm current contact via cassia.gov.
Libraries
LIBRARIES
Burley Public Library (Burley) – confirm current address/phone via the county library system.
Parks & Recreation
PARKS & RECREATION
Key Assets: City of Rocks National Reserve (National Historic Landmark, 2.5-billion-year-old exposed rock), Castle Rocks State Park, Pomerelle Mountain Resort (skiing), and the historic Albion State Normal School campus are the county’s premier heritage and recreational attractions.
Notes: The genuine, remarkable geological and historical significance of the City of Rocks National Reserve – among the oldest exposed rock in North America and a major Oregon/California Trail landmark – is among the standout local facts covered in this project.
GIS & Maps
GIS & MAPS
Appraisal/Parcel Search: Cassia County Assessor’s Office – confirm current contact via cassia.gov.
Animal Services
ANIMAL SERVICES
Confirm current dedicated shelter contact via cassia.gov; Cassia County Sheriff’s Office for animal control arrangements.
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Office: Cassia County Solid Waste / Planning & Zoning – confirm current contact via cassia.gov.
NOTES: Cassia County is the sixteenth county completed in Idaho’s Round 3 v2 redo, under the A+ sourced standard established for this project. The genuine, remarkable geological and historical significance of the City of Rocks National Reserve is among the standout local facts covered in this project. All contact information above was sourced via web search as of early August 2026 and should be reconfirmed directly with the relevant office before a visit, deadline-sensitive filing, or emergency-adjacent decision.
About Cassia County
Cassia County is the City of Rocks and California Trail country – the extraordinary granite spire landscape that California-bound emigrants described in their journals and the Snake River Plain’s potato and dairy production define a south-central Idaho county of natural and historical distinction.
Burley (the county seat, population ~10,000) is the Magic Valley’s southeastern hub – the Snake River, potato processing, and dairy operations anchor a community between Twin Falls and the Utah border.
All Services
Browse every category and topic available for this county.
Cassia County Assessor at 1459 Overland Avenue, Suite 1, Burley, ID 83318, phone 208-878-7301. ID homeowner’s exemption up to $125,000.
Courts & Legal
Cassia County District Court at 1459 Overland Avenue, Burley, ID 83318, phone 208-878-7301, handles probate.
Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
COUNTY CLERK / ADMINISTRATOR
1459 Overland Ave., Burley, ID 83318
(208) 878-7302
CLERK OF COURT (Records, Marriage Licenses)
1459 Overland Ave., Burley, ID 83318
(208) 878-7302
ELECTIONS / CLERK
1459 Overland Ave., Burley, ID 83318
(208) 878-7302
Genealogy
County-level record sources
Cassia County Magistrate Court (probate/estate case files – see Probate section above).
Local societies
No dedicated Cassia County genealogical society was confirmed in available directories.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Where to go
Cassia County Magistrate Court 1459 Overland Avenue, Burley, ID 83318 (208) 878-7351
The Magistrate Court is located within the Judicial Center complex; free parking is generally available adjacent to the building.
Step 1: figure out which path applies
Idaho has adopted the Uniform Probate Code (Idaho Code Title 15). Idaho is also a community property state. Idaho recognizes four main paths:
Small Estate Affidavit – a non-court process for estates with a total value of $100,000 or less (excluding liens and encumbrances) and no real property. Available 30 days after death. No court filing required (Idaho Code § 15-3-1201).
Summary Administration – available when the value of all the decedent’s property is less than the homestead allowance, exempt property, and last-illness medical expenses combined, or when a surviving spouse is sole beneficiary (Idaho Code §§ 15-3-1203, 15-3-1205).
Informal Probate – the most common track for uncontested estates, handled through the court registrar.
Formal Probate – court-supervised proceedings required when disputes arise or the will is contested.
Step 2: filing
For informal probate with a will, file an Application for Informal Probate of Will and Appointment of Personal Representative with the Magistrate Division.
For formal probate, file a Petition for Probate of Will and Appointment of Personal Representative (or the equivalent for intestate estates).
Idaho does not have a statutory fee schedule for attorneys or personal representatives – fees must be reasonable given the services rendered and complexity.
If formal or informal probate is needed
Determine whether small estate affidavit, summary administration, or full probate applies.
File the appropriate application or petition with the Cassia County Magistrate Court.
Under informal proceedings, the registrar reviews the application without a hearing. Under formal proceedings, a judge holds a hearing.
The personal representative accepts the appointment and may need to post a bond.
Once appointed, the court issues Letters Testamentary or Letters of Administration. Obtain several certified copies.
Publish notice to creditors as required.
Mail notice to all heirs, beneficiaries, and interested parties.
Marshal assets, obtain an EIN, open an estate account, pay valid debts and expenses, and prepare any required inventory.
Distribute remaining assets per the will or Idaho’s intestacy statutes, then close the estate.
What it costs
Idaho does not impose its own state estate or inheritance tax.
Idaho does not have a statutory fee schedule for attorneys or personal representatives.
Court filing fees and publication costs are separate – confirm current amounts with the Cassia County Magistrate Court.
Probate in Idaho typically takes 6-12 months for uncontested estates.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
1415 Albion Ave., Burley, ID 83318
(208) 878-2251
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
ELECTIONS / CLERK
1459 Overland Ave., Burley, ID 83318
(208) 878-7302
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Idaho Dept of Health & Welfare — South Central
(208) 736-3072
Idaho Medicaid
(800) 926-2588
Cassia Regional Hospital
cassiaregional.org (Burley)
Public Health Information
PUBLIC HEALTH
Office: South Central Public Health District (serving Cassia County) – confirm current contact via phd5.idaho.gov.
Editorial independence: CountyOffices maintains strict editorial independence from our affiliate partners. Our content is researched from official government sources. Affiliate relationships do not influence our recommendations or the information we publish.
Editorial Trust
5 official sources cited
Reviewed by CountyOffices Editorial Team
Last verified June 2026
County Facts
County Seat: Burley
Population: 24,000
Area: 2,566 sq mi
Established: 1879
Tier: 3
Public Records
TruthFinder
Search public records for Cassia County residents.
