The Honorable Charles S. Treat

Contra Costa County Superior Court

Court Info

Contra Costa County Superior Court, Department 12 (website)

Clerk phone: 925-608-1112

Courtroom Rules


Hon. Charles S. Treat is a judge of the Superior Court of Contra Costa County in California. Former Governor Arnold Schwarzenegger appointed Judge Treat in 2005.

He is a Democrat.

Two of the most highlighted cases of his legal practice was a 12-year contract arbitration battle which culminated in an en banc Ninth Circuit decision, and recovery of a 9-figure amount on behalf of his client. The other one was a successful settlement in a suit against a Central Valley municipality, in which he saved the building permits of low-income farm workers.

Judge Treat and his wife live in Lafayette, California, with their 2 sons.


  • J.D. from University of Chicago (1980)
  • Bachelor's degree from Michigan State University (1977) (Political Philosophy)


  • Judicial clerk at Judge John Minor Wisdom, United States Court of Appeals in New Orleans, Louisiana
  • Judicial clerk at William Brennan, Associate Supreme Court Justice
  • Civil litigator at Latham & Watkins in California