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 October 2, 2026.
Cambridge, Massachusetts, in Middlesex County, has about 121,000 residents (2024 Census Bureau estimate). An OUI arrest in Cambridge starts two cases, a criminal case in the District Court and a license case before the Registry of Motor Vehicles, 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: Cambridge public records, Middlesex County OUI, Cambridge arrest records, Cambridge warrants, Cambridge inmate search, Cambridge criminal records, Massachusetts arrest records and Massachusetts inmate search.
The OUI Law in Massachusetts
In Massachusetts the offense is OUI, and the limit is 0.08.
Driving in Massachusetts is consent to a breath or blood test when an officer has cause to suspect OUI; the license case that follows a refusal or a failed test is run by the Registry of Motor Vehicles, separately from the criminal case.
Massachusetts sets no time limit on prior offenses: every earlier conviction counts toward a repeat charge.
Who Makes OUI Arrests in Cambridge
The Middlesex Sheriff's Office, MA | Official Website and the agency that reports for Cambridge (filed by the FBI as Cambridge Police Department) make the OUI arrests in and around Cambridge.
The FBI's agency list also places 12 campus police departments, one state agency and one state police unit in Middlesex County (the arrest records guide names each one); the Middlesex County State Police makes the arrests on the state highways.
Together, the 51 agencies in Middlesex County with all twelve months of 2025 on file reported 15,399 arrests to the FBI that year, all offenses together; the FBI's count for Middlesex County does not break OUI out.
Booking After an OUI Arrest in Cambridge
A driver arrested for OUI and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the Middlesex Sheriff's Office, MA | Official Website, held about 710 people on an average day in 2025 by the Vera Institute of Justice's count and has a jail page SearchSystems verified at middlesexsheriff.org. The Cambridge inmate search guide covers the jail in full.
The Court Case
The District Attorney files the charge, and the case is heard in the District Court.
The District Attorney's page SearchSystems verified is at middlesexda.com, phone (781) 897-8300.
The court records page SearchSystems verified for the county is at mass.gov/search-court-dockets-calendars-and-case-information.
Statewide, masscourts.org is the Massachusetts Trial Court's free online case search.
The License Case
The court case is only half the record. The Registry of Motor Vehicles runs a separate administrative case over the license, which can suspend it before the criminal case is decided, and the Massachusetts Registry of Motor Vehicles keeps the driving record the conviction goes on.
The Records an OUI Leaves
- The arrest report: from the agency that made the arrest, under the Massachusetts Public Records Law.
- The court file: from the District Court, kept by the Clerk of Courts.
- The driving record: from the Massachusetts Registry of Motor Vehicles.
More on each: Cambridge arrest records, Cambridge police reports and Cambridge court records.
Frequently Asked Questions
What is the OUI limit in Massachusetts?
0.08 percent blood alcohol.
Where is an OUI case from Cambridge heard?
In the District Court, brought by the District Attorney. The court records page SearchSystems verified for the county is at mass.gov.
Where is a person arrested for OUI in Cambridge held?
At the county jail, run by the Middlesex Sheriff's Office, MA | Official Website, if kept in custody.
Who handles the license after an OUI arrest in Massachusetts?
The Registry of Motor Vehicles, in an administrative case separate from the court case.
How long does an OUI count as a prior in Massachusetts?
There is no time limit; every prior conviction counts.
Is this the official Cambridge 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.