About Mark Klaassen
Born 1973. Mark Klaassen is an American lawyer.
United States Attorney for the District of Wyoming
On August 3, 2017, Donald Trump nominated Klaassen to be United States Attorney for the District of Wyoming. He was confirmed by the United States Senate by voice vote on November 9, 2017, and sworn into office on November 21, 2017. He resigned on January 31, 2021.
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Important facts
People in Mark Klaassen's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Mark Klaassen's
Frequently asked questions
Who is Mark Klaassen?
American lawyer
When was Mark Klaassen born?
Mark Klaassen was born on 17 April 1973 in Gillette.
What is Mark Klaassen's occupation?
Mark Klaassen is a lawyer.
What nationality is Mark Klaassen?
Mark Klaassen is American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Mark Klaassen. https://biography.guide/mark-klaassen/
MLA: "Mark Klaassen." Biography.guide, https://biography.guide/mark-klaassen/.
Chicago: "Mark Klaassen." Biography.guide. https://biography.guide/mark-klaassen/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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