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 between September 23, 2026 and September 25, 2026.
Ontario, California, in San Bernardino County, has about 185,000 residents (2024 Census Bureau estimate). A DUI arrest in Ontario starts two cases, a criminal case (in the Superior Court of California, County of San Bernardino) 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: Ontario public records, San Bernardino County DUI, Ontario arrest records, Ontario warrants, Ontario inmate search, Ontario criminal records, California arrest records and California inmate search.
The DUI Law in California
Drunk driving is charged as DUI in California, at a blood alcohol level of 0.08 or more.
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 Ontario
The San Bernardino County Sheriff's Office and the agency that reports for Ontario (filed by the FBI as Ontario Police Department) make the DUI arrests in and around Ontario.
The FBI's agency list also places three campus police departments, five other agencies, two state agencies and ten state police units in San Bernardino County (the arrest records guide names each one); the Highway Patrol's ten offices make the arrests on the state highways.
Together, the seven agencies in San Bernardino County with all twelve months of 2025 on file reported 16,078 arrests to the FBI that year, all offenses together; the FBI's count for San Bernardino County does not break DUI out.
Booking After a DUI Arrest in Ontario
A driver arrested for DUI and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the San Bernardino County Sheriff's Office, held about 4,570 people on an average day in 2025 by the Vera Institute of Justice's count and has a custody page SearchSystems verified at jimsnetil.shr.sbcounty.gov/bookingsearch.aspx, phone (213) 894-2485. The Ontario 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 San Bernardino.
The District Attorney's page SearchSystems verified is at da.sbcounty.gov, phone (909) 382-3800.
The court records page SearchSystems verified for the county is at sanbernardino.courts.ca.gov/online-services/case-information-documents.
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 San Bernardino, kept by the Superior Court clerk.
- The driving record: from the California Department of Motor Vehicles.
More on each: Ontario arrest records, Ontario police reports and Ontario court records.
Frequently Asked Questions
What is the DUI limit in California?
0.08 percent blood alcohol.
Where is a DUI case from Ontario heard?
In the Superior Court of California, County of San Bernardino, brought by the District Attorney. The court records page SearchSystems verified for the county is at sanbernardino.courts.ca.gov.
Where is a person arrested for DUI in Ontario held?
At the county jail, run by the San Bernardino 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 Ontario 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.