Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest and crime 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 26, 2026.
Ontario, Oregon, in Malheur County, has about 12,000 residents (2024 Census Bureau estimate). In Oregon the public criminal record is the court file, kept by the trial court administrator; the statewide criminal history kept by the Oregon State Police is open to anyone who asks. This guide says where each record of a criminal case from Ontario is kept and how it is seen.
This guide covers the court file, the statewide record, local arrest records, the crimes behind the records, the prosecutor, sex offender registry, records requests, directory links and common questions.
Related guides: Ontario public records, Malheur County criminal records, Ontario arrest records, Ontario warrants, Ontario inmate search, Ontario court records, Oregon arrest records and Oregon inmate search.
Criminal Cases in the Malheur County Circuit Court
A criminal case from Ontario is filed in the Malheur County Circuit Court, and the court file, kept by the trial court administrator, is the record of it that the public may see.
For Malheur County, SearchSystems opened and checked the court records page for the county at courts.oregon.gov/courts/malheur/records/pages/default.aspx (page title: Oregon Judicial Department : Court Records : Court Records : State of Oregon), phone 541-473-5171, which answered when SearchSystems opened it on September 24, 2026.
Statewide, Oregon eCourt Case Information is the Oregon Judicial Department's online case search, free for basic case information.
The Oregon Criminal History and Your Own Copy
Oregon is one of the states that lets anyone look up another person's statewide criminal history: an Open Record Request returns anyone's Oregon conviction record by name, and the subject is told who asked, for $10 a search, through the Oregon State Police. The result is the repository record, what agencies reported to the state, which is wider than one county's court index but can lag it. The search is on the Oregon State Police site.
Arrest Records Kept Locally in Ontario
The Malheur County Sheriff's Office and the agency that reports for Ontario (filed by the FBI as Ontario Police Department) keep the arrest records in and around Ontario: the report and the booking record of each arrest stay with the agency that made it, separate from the court file and from the state repository.
The FBI's agency list also places these agencies in Malheur County: the Malheur County Liquor Commission (state agency); the Malheur County State Police (state police); each keeps the records of its own arrests.
Together, the two agencies in Malheur County with all twelve months of 2024 on file reported 1,132 arrests to the FBI that year; how each case ended is in the court file, not in the arresting agency's.
The agencies and their counts, year by year, are in Ontario arrest records.
The Crimes Behind the Records: Ontario in 2024
The agency that reports for Ontario had 63 violent and 528 property crimes reported for 2024; each one is a report on file with it, and each arrest that follows is the start of a criminal record.
The District Attorney for Malheur County
The District Attorney decides which arrests in Malheur County become charges and files them in the Malheur County Circuit Court; the office answers questions about pending prosecutions, and the case files themselves are court records.
The office's page SearchSystems verified is at malheurco.org/district-attorney/district-attorney-information (page title: District Attorney Information | Malheur County Oregon), phone (541) 473-5127, which answered when SearchSystems opened it on September 24, 2026.
The Sex Offender Registry for Ontario
Registered sex offenders living in Ontario are listed on the Oregon Sex Offender Registry, run by the Oregon State Police. Only Level 3 and some Level 2 registrants are listed online.
Registration itself is done in person with the local agency where the registrant lives: the sheriff's office, or the city police in a city with its own department.
Asking an Agency in Malheur County for a Record
An arrest report, a booking record or a local criminal history letter comes from the agency that holds it, not from the court.
Under the Oregon Public Records Law a county office must answer a request within 15 business days where practicable, after acknowledging the request within 5, and it may charge the actual cost of making the record available. The county records request page SearchSystems verified is at malheurco.org/public-records-request-policy (page title: Public Records Request | Policy | Malheur County Oregon).
More Official Criminal Records Pages for Malheur County
The SearchSystems directory, online since 1997, lists the official pages for Malheur County and Oregon. These criminal records pages from its Malheur County listing were opened again on October 2, 2026 and each one still answers:
- Malheur County Most Wanted (sheriff.malheurco.org)
Frequently Asked Questions
Are criminal records public in Ontario?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Oregon State Police: an Open Record Request returns anyone's Oregon conviction record by name, and the subject is told who asked, for $10. The arrest report itself is released by the agency that made the arrest, under the Oregon Public Records Law.
Can I search Ontario criminal cases online?
The court records page SearchSystems verified for the county is at courts.oregon.gov (page title: Oregon Judicial Department : Court Records : Court Records : State of Oregon). Statewide, Oregon eCourt Case Information is the Oregon Judicial Department's online case search, free for basic case information.
How do I get my own Oregon criminal history?
Through the same open record request, run on yourself.
Who prosecutes crimes in Ontario?
The District Attorney, reached at (541) 473-5127, which files its cases in the Malheur County Circuit Court.
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.