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.
Dallas County, Missouri, has about 18,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Dallas County is held at the county jail, run by the Dallas 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: Dallas County public records, Dallas County arrest records, Dallas County warrants, Dallas County criminal records, Dallas County court records, Missouri arrest records and Missouri inmate search.
Finding Someone in Custody in Dallas County
A person kept in custody after an arrest in Dallas County is held at the county jail, run by the Dallas County Sheriff's Office, whichever agency made the arrest.
SearchSystems opened and checked the jail page of the Dallas County Sheriff's Office at dcsomo.com (page title: DALLAS COUNTY SHERIFF'S OFFICE is under construction), which answered when SearchSystems opened it on September 30, 2026.
That page is the office's jail information page rather than a roster.
The Dallas County Jail by the Numbers
On an average day in 2019 the jail held about 25 people. Its rated capacity in 2019 was 34 beds, and it ran at 74 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Dallas County has about 18,000 residents (2024 Census Bureau estimate), so the jail holds about 14 people for every 10,000 residents.
Who Books People Into the Dallas County Jail
The Dallas County Sheriff's Office and the agency that reports for Buffalo make the arrests that end in a booking in Dallas County.
The largest arrest counts reported to the FBI were Buffalo's 6 for 2025 and the Dallas County Sheriff's Office's 0 for 2025.
Together, the two agencies in Dallas County with all twelve months of 2025 on file reported 6 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 Dallas County arrest records.
From the Jail to State Prison
A sentence of more than a year is served in state prison, not the jail; the Missouri Department of Corrections lists its inmates at web.mo.gov/doc/offSearchWeb.
Frequently Asked Questions
How do I find an inmate in Dallas County?
Ask the Dallas County Sheriff's Office; its jail page SearchSystems verified is at dcsomo.com.
How many people are in the Dallas County jail?
About 25 on an average day in 2019, the latest year in the Vera Institute's jail data, against a rated capacity of 34 beds.
Where do people sentenced to prison in Dallas 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 Dallas 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.