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200 North Center
Casper, WY 82601
(307) 235-9200
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Natrona County Sheriff
Sheriff Gus Holbrook
Gus Holbrook

Undersheriff Mark Sellers

Mark C. Sellers

201 N. David
Second Floor
Casper, WY  82601

Ph: (307) 235-9282
Fx: (307) 235-9252

Emergency: 911

Office Hours
Monday - Friday
8:00 am - 5:00 pm

24 Hour Non-Emergency Ph: (307) 235-9282
The Natrona County Sheriff's Office is one of the largest law enforcement agencies in the State of Wyoming, serving a countywide population of about 65,000 citizens and covering about 5,500 square miles. We employ a total of 166 employees and of those 124 are sworn. We also operate one of the largest jails in the state with a total of 460 beds.  The Natrona County Sheriff's Office has resident deputies at Alcova Lake, Casper Mountain, and Midwest. The Sheriff's office also contracts with the Town of Bar Nunn for their law enforcement.

View active warrants on our Warrant Search Page.

Tell Us
Tell us about:
  • Drug activity
  • Burglaries
  • Child abuse / neglect
  • Sexual assault

When telling us about any of these activities, please include any information that might be helpful. Your information will be acted upon. You can remain anonymous if you contact us by phone. If you choose to email the sheriff's office, they will attempt to keep your name confidential.

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