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Mercer, William Walter
Born 1964 in Billings, MT
Federal Judicial Service:
Judge, U.S. District Court for the District of Montana
Nominated by Donald J. Trump on July 15, 2025, to a seat vacated by Dana Lewis Christensen. Confirmed by the Senate on October 22, 2025, and received commission on November 6, 2025.
Education:
University of Montana, B.A., 1986
Harvard University, M.P.A., 1988
George Mason University School of Law (now Antonin Scalia Law School), J.D., 1993
Professional Career:
Federal Judicial Service:
Judge, U.S. District Court for the District of Montana
Nominated by Donald J. Trump on July 15, 2025, to a seat vacated by Dana Lewis Christensen. Confirmed by the Senate on October 22, 2025, and received commission on November 6, 2025.
Education:
University of Montana, B.A., 1986
Harvard University, M.P.A., 1988
George Mason University School of Law (now Antonin Scalia Law School), J.D., 1993
Professional Career:
Attorney advisor, U.S. Department of Justice, 1994
Assistant U.S. attorney, District of Montana, 1994-2009
Adjunct faculty, Montana State University--Billings, 1996
Adjunct faculty, University of Montana, 1997-1999
U.S. Department of Justice, 2005-2007; principal associate deputy attorney general, 2005-2006; acting associate attorney general, 2006-2007
Private practice, Billings, Montana, 2010-2025
