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), and arrests there are reported to the FBI by the Marion County Sheriff's Office and two city agencies. An arrest leaves the same records whoever makes it: the arresting agency's report, the record of anyone held at the county jail, and, if the Prosecuting Attorney files charges, a case in the Marion County Circuit Court. This guide says who keeps each one, what it costs and who may see it, with the arrest counts each agency reported.
This guide covers who makes arrests, how many arrests, booking and the jail, finding an arrest, copies, cities and common questions.
Related guides: Marion County public records, Missouri arrest records, Missouri inmate search and Missouri criminal records.
Who Makes Arrests in Marion County
The Marion County Sheriff's Office is the county agency that reports arrests to the FBI for Marion County. It reported 13 arrests for 2025.
Arrests inside two of the county's cities are reported to the FBI by an agency of the city's own, listed here with the Census population and what each reported:
- Hannibal, 16,809 residents: 573 arrests reported for 2024.
- Palmyra, 3,644 residents: 7 arrests reported for 2024.
A city on that list is reported separately whether the officers are the city's own or the sheriff's under contract; the FBI's list does not say which.
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.
How Many Arrests Each Agency Reports in Marion County
Each agency reports its arrests to the FBI by month, and the FBI publishes them on the Crime Data Explorer. These are the full-year totals, all offenses, as the FBI held them on October 8, 2026; a year with months missing or not reported is left out.
- Hannibal: 573 for 2024, 552 for 2023, 753 for 2022, 1,015 for 2021, 3,011 for 2020 and 3,952 for 2019.
- Palmyra: 7 for 2024, 22 for 2023, 31 for 2022, 36 for 2021, 67 for 2020 and 91 for 2019.
- Marion County Sheriff's Office: 13 for 2025, 29 for 2023, 18 for 2022, 52 for 2021 and 171 for 2019; 2020 and 2024 are missing months.
Together, the two agencies with all twelve months of 2024 on file reported 580 arrests that year. The same agencies with both 2024 and 2023 complete reported 580 in 2024 against 574 in 2023, up 1 percent.
Marion County Sheriff's Office reported only part of 2024 (11 months) and is left out of the totals.
Booking: Where People Arrested in Marion County Are Held
The county jail is where a person arrested in Marion County and kept in custody ends up, whichever agency made the arrest, though a city department may hold someone in its own cells first and a person cited and released at the scene is never booked. The jail's record of each person held, with the charges, is a public record of the arrest, and once the person is released or sentenced the record continues in the court file.
On an average day in 2021 the jail held about 86 people, down from about 92 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 90 beds, and it ran at 102 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the jail page of the Marion County Sheriff's Office at marioncounty-mo.gov/departments/sheriff (page title: Marion County Sheriff | Marion County, Missouri), phone (573) 769-2077, Monday through Friday. 8:00 a.m. to 4:00 p.m., which answered when SearchSystems opened it on September 30, 2026.
A sentence of more than a year is served in state prison; the Missouri Department of Corrections lists its inmates at web.mo.gov/doc/offSearchWeb.
How to Find Out About an Arrest in Marion County
An arrest in Marion County can be traced in two places, depending on where the case stands: Case.net, the Missouri courts' free statewide case search, which shows whether charges were filed; the Prosecuting Attorney, which decides whether an arrest becomes a charge (its page is at marioncounty-mo.gov/departments/prosecuting-attorney, phone (573) 221-0146).
Missouri is one of the states that lets anyone look up another person's statewide criminal history: the open record search on the MACHS site lets anyone check convictions by name, through the Missouri State Highway Patrol Criminal Justice Information Services Division. That record shows what agencies reported to the state, which is wider than one county's court index but can lag it.
Getting a Copy of an Arrest Record in Marion County
The report of an arrest is released by the agency that made it; the jail and the court hold their own records of the same event, but not the report. Under the Missouri Sunshine Law the agency must answer within 3 business days, and it may charge research time and copying.
- An arrest by the Marion County Sheriff's Office: ask its records unit, reached through the office at (573) 769-2077.
- An arrest in Hannibal or Palmyra: the records unit of the agency that reports for that city; the city guides linked above name each city's records office.
- A defendant who has been charged gets the report through the case: the Prosecuting Attorney, (573) 221-0146, handles discovery for pending cases.
- Your own statewide record: the same request described above, for your own name.
Cities in Marion County: Who Reports the Arrests
The FBI lists a separate arrest reporting agency for every one of the two cities in Marion County: Hannibal and Palmyra.
Wherever in the county the arrest happens, a person kept in custody goes to the county jail and the case goes to the Marion County Circuit Court.
SearchSystems has a guide to the offices of these cities in Marion County, with the 2024 Census Bureau population; a city with its own arrest records guide opens there:
- Hannibal (16,809)
Frequently Asked Questions
How many arrests are made in Marion County each year?
Hannibal reported 573 arrests to the FBI for 2024, and the two agencies with every month of 2024 on file reported 580 between them.
How do I find out if someone is in jail in Marion County?
Ask the Marion County Sheriff's Office at (573) 769-2077; its jail page SearchSystems verified is at marioncounty-mo.gov/departments/sheriff.
Where are people arrested in Marion County booked?
Those kept in custody go to the county jail, run by the Marion County Sheriff's Office; a person cited and released at the scene is not booked.
Are arrest records public in Marion County?
The court files of criminal cases are public, and so is the statewide criminal history kept by the Missouri State Highway Patrol Criminal Justice Information Services Division: the open record search on the MACHS site lets anyone check convictions by name. The arrest report itself is released by the agency that made the arrest, under the Missouri Sunshine Law.
How do I get a copy of an arrest report in Marion County?
From the agency that made the arrest: the Marion County Sheriff's Office for its own arrests, or the agency that reports for the city where it happened. Under the Missouri Sunshine Law the answer is due within 3 business days.
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.