Duncan, William M.

305 South StreetYreka, CA 96097- 3301

Updated: 06/27/2016


Attorney William M. Duncan graduated from Georgetown University Law School in 1981 with honors (cum laude).   His office is located in Yreka, California (County of Siskiyou), and is diagonally across the street from the court house and thus is extremely convenient for his clients.  His practice is focused almost exclusively on criminal defense, and he has represented clients charged with nearly every conceivable crime.  This includes, but is not limited to, clients...


Office Info

Practice Areas

  • Criminal Law 90%
  • Civil Litigation 10%


  • 100%

Current Employment Position(s)

  • Partner
  • President


Bar Admissions

  • California, 1987
  • U.S. District Court Eastern District of California, 1985
  • U.S. District Court Central District of California
  • U.S. District Court Northern District of California, 1985
  • U.S. District Court Southern District of California
  • U.S. District Court of the District of Columbia
  • District of Columbia Court of Appeals
  • U.S. Court of Appeals 9th Circuit, 1986
  • U.S. Supreme Court

Other Affiliations

  • Siskiyou County Bar Association, 1997 - 2008 (Member)
  • District of Columbia Bar Association (Member)
  • California State Bar Association (Member)

Past Positions

  • U.S. Coast Guard, Attorney, 1981 - 1988
  • Morrison Mahoney & Miller, Partner, 1994 - 1997


  • Georgetown University Law Center, Washington, District of Columbia, 1981
    Honors: With Honors
  • Oklahoma State University, Stillwater, Oklahoma, 1968
    Master's Degree
    Honors: cum laude
    Major: Mathematics
  • Truman State University, Kirksville, Missouri
    Honors: cum laude
    Major: Mathematics

Videos & Photos


Office Information


305 South StreetYreka, CA 96097- 3301


  • 530-937-6055


Offers Free Initial Consultation


Accepts Credit Cards


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Firm Address


305 South StreetYreka, CA 96097- 3301