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.
Marion County, Missouri, has about 28,000 residents (2024 Census Bureau estimate). A DWI arrest in Marion County starts two cases, a criminal case in the Marion County Circuit Court and a license case before the Department of Revenue, 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: Marion County public records, Marion County arrest records, Marion County warrants, Marion County inmate search, Marion County criminal records, Missouri arrest records and Missouri inmate search.
The DWI Law in Missouri
In Missouri the offense is DWI, and the limit is 0.08.
Driving in Missouri is consent to a breath or blood test when an officer has cause to suspect DWI; the license case that follows a refusal or a failed test is run by the Department of Revenue, separately from the criminal case.
Who Makes DWI Arrests in Marion County
The Marion County Sheriff's Office and the agencies that report for Hannibal and Palmyra make the DWI arrests in Marion County.
Together, the two agencies in Marion County with all twelve months of 2024 on file reported 580 arrests to the FBI that year, all offenses together; the FBI's count for Marion County does not break DWI out.
The Monroe City Police Department is listed by the FBI across three counties including Marion County, so its arrests are not broken out for Marion County here.
Booking After a DWI Arrest in Marion County
A driver arrested for DWI and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the Marion County Sheriff's Office, held about 86 people on an average day in 2021 by the Vera Institute of Justice's count and has a jail page SearchSystems verified at marioncounty-mo.gov/departments/sheriff, phone (573) 769-2077. The Marion County inmate search guide covers the jail in full.
The Court Case
The Prosecuting Attorney files the charge, and the case is heard in the Marion County Circuit Court.
The Prosecuting Attorney's page SearchSystems verified is at marioncounty-mo.gov, phone (573) 221-0146.
The court records page SearchSystems verified for the county is at courts.mo.gov/cnet.
Statewide, Case.net is the Missouri courts' free statewide case search.
The License Case
The court case is only half the record. The Department of Revenue runs a separate administrative case over the license, which can suspend it before the criminal case is decided, and the Missouri Department of Revenue Driver License Bureau keeps the driving record the conviction goes on.
The Records a DWI Leaves
- The arrest report: from the agency that made the arrest, under the Missouri Sunshine Law.
- The court file: from the Marion County Circuit Court, kept by the Circuit Clerk.
- The driving record: from the Missouri Department of Revenue Driver License Bureau.
More on each: Marion County arrest records, Marion County police reports and Marion County court records.
Frequently Asked Questions
What is the DWI limit in Missouri?
0.08 percent blood alcohol.
Where is a DWI case from Marion County heard?
In the Marion County Circuit Court, brought by the Prosecuting Attorney.
Where is a person arrested for DWI in Marion County held?
At the county jail, run by the Marion County Sheriff's Office, if kept in custody.
Who handles the license after a DWI arrest in Missouri?
The Department of Revenue, in an administrative case separate from the court case.
Is this the official Marion 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.