District of Wyoming

By Telephone

Cheyenne Main Telephone Number: (307) 772-2124 Cheyenne Toll Free Number: (800) 836-5801 Cheyenne Main Facsimile Number (307) 772-2123

Casper Main Telephone Number: (307) 261-5434 Casper Toll Free Number: (800) 809-7066 Casper Main Facsimile Number (307) 261-5471

Lander Main Telephone Number: (307) 332-8195 Lander Toll Free Number: (888) 266-1309 Lander Main Facsimile Number (307) 332-7104

Yellowstone Main Telephone Number: (307) 344-2119 Yellowstone Main Facsimile Number (307) 344-9266 BY POSTAL MAIL

Correspondence to the District of Wyoming, including the U.S. Attorney, may be sent to:

Cheyenne Headquarters Office:
United States Attorney’s Office
J.C. O’Mahoney Federal Courthouse
2120 Capitol Avenue, Suite 4000
Cheyenne, WY 82001
or
For USPS mail only, including job applications:
United States Attorney’s Office
Post Office Box 668
Cheyenne, WY 82003-0668

Casper Branch Office:
United States Attorney’s Office
Dick Cheney Federal Building
100 East "B" Street, Suite 2211
Casper, WY 82601
or
For USPS mail only:
United States Attorney’s Office
Post Office Box 22211
Casper, WY 82602-5010

Lander Branch Office:
United States Attorney’s Office
331 Main Street, Suite A
Lander, WY 82520
or
For USPS mail only:
United States Attorney’s Office
Post Office Box 449
Lander, WY 82520-0449

Yellowstone National Park Branch Office, all deliveries:
United States Attorney’s Office
Yellowstone Justice Center
Building #MA-1015, Room 213
Mammoth Hot Springs, WY 82190
or
For USPS mail only:
United States Attorney’s Office
Post Office Box 703
Yellowstone NP, WY 82190

Meet the U.S. Attorney L. Robert Murray Acting United States Attorney

L. Robert Murray has been the Acting United States Attorney for the District of Wyoming since February 1, 2021. Prior to assuming this position, he served as the First Assistant U.S. Attorney for the District of Wyoming and oversaw the daily operations of the Criminal, Civil, and Administrative Divisions. ****