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.
Casper, Wyoming, in Natrona County, has about 59,000 residents (2024 Census Bureau estimate). A DWUI arrest in Casper starts two cases, a criminal case in the Circuit Court and a license case before the Department of Transportation, and leaves three records. This guide follows the arrest from the roadside to the court file and the driving record.
This guide covers the law, the arrest, booking, the court case, the license case, the records and common questions.
Related guides: Casper public records, Natrona County DWUI, Casper arrest records, Casper warrants, Casper inmate search, Casper criminal records, Wyoming arrest records and Wyoming inmate search.
The DWUI Law in Wyoming
Drunk driving is charged as DWUI in Wyoming, at a blood alcohol level of 0.08 or more.
Driving in Wyoming is consent to a breath or blood test when an officer has cause to suspect DWUI; the license case that follows a refusal or a failed test is run by the Department of Transportation, separately from the criminal case.
For charging and sentencing, Wyoming counts prior offenses within 10 years.
Who Makes DWUI Arrests in Casper
The Natrona County Sheriff's Office and the agency that reports for Casper (filed by the FBI as Casper Police Department) make the DWUI arrests in and around Casper.
Together, the three agencies in Natrona County with all twelve months of 2025 on file reported 3,056 arrests to the FBI that year, all offenses together; the FBI's count for Natrona County does not break DWUI out.
Booking After a DWUI Arrest in Casper
A driver arrested for DWUI and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the Natrona County Sheriff's Office, held about 200 people on an average day in 2023 by the Vera Institute of Justice's count and has a jail page SearchSystems verified at warrants.natronacounty-wy.gov. The Casper inmate search guide covers the jail in full.
The Court Case
A DWUI charge from Casper is brought by the County Attorney in the Circuit Court.
The County Attorney's page SearchSystems verified is at natronacounty-wy.gov/Directory.aspx?did=19.
The court records page SearchSystems verified for the county is at natronacounty-wy.gov/89/Court-Cases.
Wyoming has no single public index of every trial court case; each court's records are looked up through that court.
The License Case
The court case is only half the record. The Department of Transportation runs a separate administrative case over the license, which can suspend it before the criminal case is decided, and the Wyoming Department of Transportation keeps the driving record the conviction goes on.
The Records a DWUI Leaves
- The arrest report: from the agency that made the arrest, under the Wyoming Public Records Act.
- The court file: from the Circuit Court, kept by the Clerk of District Court.
- The driving record: from the Wyoming Department of Transportation.
More on each: Casper arrest records, Casper police reports and Casper court records.
Frequently Asked Questions
What is the DWUI limit in Wyoming?
0.08 percent blood alcohol.
Where is a DWUI case from Casper heard?
In the Circuit Court, brought by the County Attorney. The court records page SearchSystems verified for the county is at natronacounty-wy.gov/89/Court-Cases.
Where is a person arrested for DWUI in Casper held?
At the county jail, run by the Natrona County Sheriff's Office, if kept in custody.
Who handles the license after a DWUI arrest in Wyoming?
The Department of Transportation, in an administrative case separate from the court case.
How long does a DWUI count as a prior in Wyoming?
10 years.
Is this the official Casper 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.