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 24, 2026 and October 2, 2026.
Natrona County, Wyoming, has about 80,000 residents (2024 Census Bureau estimate). A person kept in custody after an arrest in Natrona County is held at the county jail, run by the Natrona 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: Natrona County public records, Natrona County arrest records, Natrona County warrants, Natrona County criminal records, Natrona County court records, Wyoming arrest records and Wyoming inmate search.
Finding Someone in Custody in Natrona County
The county jail, run by the Natrona County Sheriff's Office, holds everyone kept in custody after an arrest in Natrona County, from every agency.
SearchSystems opened and checked the jail page of the Natrona County Sheriff's Office at warrants.natronacounty-wy.gov (page title: Sheriff Office Warrants), which answered when SearchSystems opened it on September 24, 2026.
That page is the office's jail information page rather than a roster.
The Natrona County Jail by the Numbers
On an average day in 2023 the jail held about 200 people, down from about 270 in 2019. Its rated capacity in 2019, the last year with a capacity figure, was 476 beds, and it ran at 57 percent of it that year. The figures are from the Vera Institute of Justice's Incarceration Trends data.
Natrona County has about 80,000 residents (2024 Census Bureau estimate), so the jail holds about 25 people for every 10,000 residents.
Who Books People Into the Natrona County Jail
The Natrona County Sheriff's Office and the agencies that report for Casper, Mills and Evansville make the arrests that end in a booking in Natrona County.
The largest arrest counts reported to the FBI were Casper's 2,611 for 2025, Mills's 263 for 2025 and the Natrona County Sheriff's Office's 182 for 2025.
Together, the three agencies in Natrona County with all twelve months of 2025 on file reported 3,056 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 Natrona 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 Natrona County serves the sentence in a facility of the Wyoming Department of Corrections, whose inmate locator is at wdoc-loc.wyo.gov.
Frequently Asked Questions
How do I find an inmate in Natrona County?
Ask the Natrona County Sheriff's Office; its jail page SearchSystems verified is at warrants.natronacounty-wy.gov.
How many people are in the Natrona County jail?
About 200 on an average day in 2023, the latest year in the Vera Institute's jail data, against a rated capacity of 476 beds.
Where do people sentenced to prison in Natrona County go?
To a facility of the Wyoming Department of Corrections; its inmate locator is at wdoc-loc.wyo.gov.
Is this the official Natrona 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.