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.
Preston, Idaho, in Franklin County, has about 6,200 residents (2024 Census Bureau estimate). A DUI arrest in Preston 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: Preston public records, Franklin County DUI, Preston arrest records, Preston warrants, Preston criminal records, Preston 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 Preston
The Franklin County Sheriff's Office and the agency that reports for Preston (filed by the FBI as Preston Police Department) make the DUI arrests in and around Preston.
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 Preston
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 Preston 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
A DUI arrest starts two cases: the criminal one above and an administrative one over the license, run by the Idaho Transportation Department. The driving record, kept by the Idaho Transportation Department Division of Motor Vehicles, carries the result of both.
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: Preston arrest records, Preston police reports and Preston court records.
Frequently Asked Questions
What is the DUI limit in Idaho?
0.08 percent blood alcohol.
Where is a DUI case from Preston 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 Preston 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 Preston website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.