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 on September 23, 2026.
Platte County, Missouri, has about 113,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Platte County is held at the county jail, run by the Platte County Sheriff's Office, and the jail's record of each person held is a public record. This guide says where to look for someone in custody, what the jail holds and who books people into it.
This guide covers the search, the jail, who books people, state prison and common questions.
Related guides: Platte County public records, Platte County arrest records, Platte County warrants, Platte County police reports, Platte County property records, Missouri arrest records and Missouri inmate search.
Finding Someone in Custody in Platte County
A person kept in custody after an arrest in Platte County is held at the county jail, run by the Platte County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Platte County Sheriff's Office at plattesheriff.org/divisions/detention/index.php (page title: Sheriff Platte County), phone 816-858-2424, Monday - Friday, 8 am to 5 pm, which answered when SearchSystems opened it on September 23, 2026.
That page is the office's jail information page rather than a roster, so a search for a particular person goes through the office at 816-858-2424.
The Platte County Jail by the Numbers
On an average day in 2021 the jail held about 120 people, down from about 170 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 180 beds, and it ran at 95 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Platte County has about 113,000 residents (2024 Census Bureau estimate), so the jail holds about 11 people for every 10,000 residents.
Who Books People Into the Platte County Jail
The Platte County Sheriff's Office and the agencies that report for Parkville, Platte City, Riverside, Weatherby Lake, Weston, Edgerton and two more cities make the arrests that end in a booking in Platte County.
The FBI's agency list also places one more agency in Platte County: Kansas City International Airport (other agency).
The Smithville Police Department and the Kansas City Police Department are each listed by the FBI across several counties including Platte County, so their arrests are not broken out for Platte County here.
The largest arrest counts reported to the FBI were Edgerton's 1,177 for 2025, the Platte County Sheriff's Office's 1,113 for 2025 and Riverside's 393 for 2025.
Together, the seven agencies in Platte County with all twelve months of 2025 on file reported 2,702 arrests to the FBI that year. Those kept in custody were booked into the county jail; a person cited and released at the scene was not.
The counts, agency by agency and year by year, are in Platte County arrest records.
From the Jail to State Prison
The jail holds people awaiting trial and people serving short sentences. A person sentenced to prison in Platte County serves the sentence in a facility of the Missouri Department of Corrections, whose inmate locator is at web.mo.gov/doc/offSearchWeb.
Frequently Asked Questions
How do I find an inmate in Platte County?
Ask the Platte County Sheriff's Office at 816-858-2424; its jail page SearchSystems verified is at plattesheriff.org.
How many people are in the Platte County jail?
About 120 on an average day in 2021, the latest year in the Vera Institute's jail data, against a rated capacity of 180 beds.
What is the phone number for the Platte County jail?
816-858-2424, the number on the page of the Platte County Sheriff's Office SearchSystems verified.
Where do people sentenced to prison in Platte County go?
To a facility of the Missouri Department of Corrections; its inmate locator is at web.mo.gov/doc/offSearchWeb.
Is this the official Platte 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.