Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. 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.
Jennings, Missouri, in St. Louis County, has about 13,000 residents (2024 Census Bureau estimate). An arrest in the city 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 St. Louis County Circuit Court. This guide says who keeps each one, what it costs and who may see it.
This guide covers who makes arrests, booking and the jail, finding an arrest, copies and common questions.
Related guides: Jennings public records, St. Louis County arrest records, Missouri arrest records and Missouri inmate search.
Who Makes Arrests in Jennings
The FBI lists no arrest reporting agency under the name of Jennings.
The FBI's agency list also places these agencies in St. Louis County: St. Louis County Park Rangers and Lambert-St. Louis International Airport (other); St. Louis Community College at Meramec, the University of Missouri at St. Louis and Washington University (campus police).
Booking: Where People Arrested in Jennings Are Held
A person kept in custody after an arrest in Jennings is held at the county jail, whichever agency made the arrest, apart from the short stay some city departments' own holding cells allow; a person cited and released at the scene is not booked at all. The jail's record of each person held, with the charges, is a public record of the arrest, and the court file takes over from there.
On an average day in 2024 the jail held about 1,140 people, up from about 1,000 in 2019. Its rated capacity in 2023, the last year with a capacity figure, was 1,232 beds, and it ran at 81 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
SearchSystems opened and checked the custody page of the sheriff's office at stlouis-mo.gov/government/departments/public-safety/corrections/stl... (page title: Locate a St. Louis City Inmate), phone 314-241-8339, 200 S. Tucker Blvd. St. Louis, MO 63102, Monday - Friday 8:00 am - 5:00 pm, which answered when SearchSystems opened it on September 23, 2026.
That page is the place to look for someone who was booked recently; a person cited and released at the scene, or held only a few hours by a city department, will not be on it.
A person sentenced to prison serves the sentence in a facility of the Missouri Department of Corrections, whose inmate locator is at web.mo.gov/doc/offSearchWeb.
How to Find Out About an Arrest in Jennings
An arrest in Jennings can be traced in two places, depending on where the case stands: the custody page of the sheriff's office described above, for anyone booked into the county jail; the case index of the St. Louis County Circuit Court, which shows whether charges were filed and the next court date (the court records page SearchSystems verified is at stlouis-mo.gov/external/22-circuit-court/Circuit-Clerk.cfm, phone (314) 622-4433).
Statewide, Case.net is the Missouri courts' free statewide case search.
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 Jennings
An arrest report belongs to the agency whose officer wrote it, and that agency releases it, not the court or the jail. 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 Jennings police: the police department's page SearchSystems verified at carthagepd.org/missouri/police-department/jennings-police-department-3 (page title: Jennings Police Department), a site that blocks automated checks (HTTP 403), so open it in a browser.
- The court file of a case that was filed: the St. Louis County Circuit Court, through the court records page at stlouis-mo.gov, phone (314) 622-4433.
- Any county record that is not posted: the county records request page SearchSystems verified is at recordsrequest.stlouiscountymo.gov (page title: St. Louis County Sunshine RequestsNextRequest | Modern FOIA & Public Records Request Software).
- Your own statewide record: the same request described above, for your own name.
The St. Louis County guide covers every agency in the county: St. Louis County arrest records.
Frequently Asked Questions
How do I find out if someone is in jail in Jennings?
Look on the custody page of the sheriff's office at stlouis-mo.gov, or call 314-241-8339. It covers people booked into the county jail.
Where are people arrested in Jennings booked?
Those kept in custody go to the county jail; a person cited and released at the scene is not booked.
Are arrest records public in Jennings?
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 Jennings?
From the agency that made the arrest: for most arrests in St. Louis County, the Pacific Police Department. Under the Missouri Sunshine Law the answer is due within 3 business days; the county records request page SearchSystems verified is at recordsrequest.stlouiscountymo.gov.
Is this the official Jennings 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.