Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. Every office link was opened and checked against the office's own site between September 24, 2026 and September 28, 2026.
Franklin County, Idaho, has about 16,000 residents (2024 Census Bureau estimate). A DUI arrest in Franklin County starts two cases, a criminal case in the Magistrate Division and a license case before the Idaho Transportation Department, and leaves three records. This guide follows the arrest from the roadside to the court file and the driving record.
This guide covers the law, the arrest, booking, the court case, the license case, the records and common questions.
Related guides: Franklin County public records, Franklin County arrest records, Franklin County warrants, Franklin County criminal records, Franklin County court records, Idaho arrest records and Idaho inmate search.
The DUI Law in Idaho
Drunk driving is charged as DUI in Idaho, at a blood alcohol level of 0.08 or more.
Driving in Idaho is consent to a breath or blood test when an officer has cause to suspect DUI; the license case that follows a refusal or a failed test is run by the Idaho Transportation Department, separately from the criminal case.
Who Makes DUI Arrests in Franklin County
The Franklin County Sheriff's Office and the agency that reports for Preston make the DUI arrests in Franklin County.
Together, the two agencies in Franklin County with all twelve months of 2025 on file reported 73 arrests to the FBI that year, all offenses together; the FBI's count for Franklin County does not break DUI out.
Booking After a DUI Arrest in Franklin County
A driver arrested for DUI and kept in custody goes to the county jail, whichever agency made the arrest.
The Court Case
A DUI charge from Franklin County is brought by the Prosecuting Attorney in the Magistrate Division.
The Prosecuting Attorney's page SearchSystems verified is at franklincountyidaho.org, phone 208-852-1090.
The court records page SearchSystems verified for the county is at fcmcclerk.com/case/search.
Statewide, iCourt Portal is the Idaho courts' free statewide case search.
The License Case
The court case is only half the record. The Idaho Transportation Department runs a separate administrative case over the license, which can suspend it before the criminal case is decided, and the Idaho Transportation Department Division of Motor Vehicles keeps the driving record the conviction goes on.
The Records a DUI Leaves
- The arrest report: from the agency that made the arrest, under the Idaho Public Records Act.
- The court file: from the Magistrate Division, kept by the Clerk of the District Court.
- The driving record: from the Idaho Transportation Department Division of Motor Vehicles.
More on each: Franklin County arrest records, Franklin County police reports and Franklin County court records.
Frequently Asked Questions
What is the DUI limit in Idaho?
0.08 percent blood alcohol.
Where is a DUI case from Franklin County heard?
In the Magistrate Division, brought by the Prosecuting Attorney. The court records page SearchSystems verified for the county is at fcmcclerk.com/case/search.
Where is a person arrested for DUI in Franklin County held?
At the county jail, run by the Franklin County Sheriff's Office, if kept in custody.
Who handles the license after a DUI arrest in Idaho?
The Idaho Transportation Department, in an administrative case separate from the court case.
Is this the official Franklin County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.