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. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site on September 23, 2026.
Mendocino County, California, has about 89,000 residents (2024 Census Bureau estimate). A DUI arrest in Mendocino County starts two cases, a criminal case (in the Superior Court of California, County of Mendocino) and a license case before the DMV, 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: Mendocino County public records, Mendocino County arrest records, Mendocino County warrants, Mendocino County inmate search, Mendocino County criminal records, California arrest records and California inmate search.
The DUI Law in California
In California the offense is DUI, and the limit is 0.08.
Driving in California 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 DMV, separately from the criminal case.
For charging and sentencing, California counts prior offenses within 10 years.
Who Makes DUI Arrests in Mendocino County
The Mendocino County Sheriff's Office and the agencies that report for Ukiah, Fort Bragg and Willits make the DUI arrests in Mendocino County.
The FBI's agency list also places these agencies in Mendocino County: Union Pacific Railroad in Mendocino County (other agency); California Department of Forestry and Fire Protection at Mendocino (state agency); the Highway Patrol's Ukiah Area Office (state police); the Highway Patrol's Ukiah Area Office makes the arrests on the state highways.
Together, the four agencies in Mendocino County with all twelve months of 2025 on file reported 2,475 arrests to the FBI that year, all offenses together; the FBI's count for Mendocino County does not break DUI out.
Booking After a DUI Arrest in Mendocino County
A driver arrested for DUI and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the Mendocino County Sheriff's Office, held about 240 people on an average day in 2025 by the Vera Institute of Justice's count and has a custody page SearchSystems verified at mendocinocounty.gov/government/inmate-locator. The Mendocino County inmate search guide covers the jail in full.
The Court Case
The District Attorney files the charge, and the case is heard in the Superior Court of California, County of Mendocino.
The District Attorney's page SearchSystems verified is at mendocinocounty.gov, phone 707.463.4211.
The court records page SearchSystems verified for the county is at mendocino.courts.ca.gov/portal, phone 916-845-4064.
California has no single public index of every trial court case; each court's records are looked up through that court.
The License Case
The court case is only half the record. The DMV runs a separate administrative case over the license, which can suspend it before the criminal case is decided, and the California Department 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 California Public Records Act.
- The court file: from the Superior Court of California, County of Mendocino, kept by the Superior Court clerk.
- The driving record: from the California Department of Motor Vehicles.
More on each: Mendocino County arrest records, Mendocino County police reports and Mendocino County court records.
Frequently Asked Questions
What is the DUI limit in California?
0.08 percent blood alcohol.
Where is a DUI case from Mendocino County heard?
In the Superior Court of California, County of Mendocino, brought by the District Attorney. The court records page SearchSystems verified for the county is at mendocino.courts.ca.gov/portal.
Where is a person arrested for DUI in Mendocino County held?
At the county jail, run by the Mendocino County Sheriff's Office, if kept in custody.
Who handles the license after a DUI arrest in California?
The DMV, in an administrative case separate from the court case.
How long does a DUI count as a prior in California?
10 years.
Is this the official Mendocino 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.