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Business Permitting, Sales and Use Tax, Workers Comp,
Unemployment Insurance, and EIN Information

Sales and Use Tax
Department of Revenue
Herschler Building, 2nd Floor West
Cheyenne, WY 82002
Ph. 307.777.5200
Fax 307.777.3632
Email: dor@wyo.gov
Website: https://revenue.wyo.gov/divisions/excise-tax

Workers' Compensation
Department of Workforce Services
1510 E. Pershing Blvd., South Door, 1st Floor
Cheyenne, WY 82002
Ph. 307.777.6763
Fax 307.777.5298
Email: DWS-AskMeWC@wyo.gov
Website: https://dws.wyo.gov/dws-division/workers-compensation/

Unemployment Insurance
Department of Workforce Services
Physical Address: 100 West Midwest, Casper, 82601
Mailing Address: P.O. Box 2760, Casper, WY 82602-2760
Ph. 307.235.3264
Fax 307.235.3277
Website: https://dws.wyo.gov/dws-division/unemployment-insurance/

Internal Revenue Service
Cheyenne Address: 5353 Yellowstone Road, 2nd Floor, Room 200, Cheyenne, 82009
Casper Address: 100 East "B" Street, Room 1136, Casper, 82602
Sheridan Address: 1949 Sugarland Drive, Suite 292, Sheridan, 82801
Ph. 800.829.1040
Website: https://www.irs.gov

Office Information

Herschler Building East
122 W 25th St
Suites 100 and 101
Cheyenne, WY 82002-0020

For additional information,
including driving directions,
please see the Contact Us page.

Office Hours

8:00 a.m. to 5:00 p.m. MST
Monday through Friday
(except for official state holidays)

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About Our Office

We have a long history of serving the public. Beginning in April 1869 with the appointment of the first Secretary of the Territory of Wyoming, Edward M. Lee, by United States President Ulysses S. Grant, this office has always served the public from the State Capitol Building. However, following the completion of the Capitol Renovation Project in 2019, the Office is now located at Herschler Building East, Suites 100 and 101.