Judge John L. Grandsaert | Trellis: Legal Intelligence + Judicial Analytics

The Honorable John L. Grandsaert

San Mateo County Superior Court, Department 11 (website)

Court Info

San Mateo County Superior Court, Department 11 (website)

Clerk phone: (650) 261-­5111


The Hon. John L. "Jack" Grandsaert is a judge for the Superior Court of San Mateo County in California. He was appointed in 2004.

In 2014, the judge was given an award for his service to military veterans.

He is a Republican.


LL.M. from Golden Gate University (1982)

J.D. from University of California, Hastings College of the Law (1977)

B.S. from University of San Francisco (1974)


Associate at Hunt & Hunt (1977 to 1984)

Deputy District Attorney at Riverside County District Attorney in Riverside County, California (1984 to 1987)

Special Assistant at U.S. Attorney (1985 to 1986)

Deputy District Attorney at San Mateo County District Attorney in San Mateo County, California (1987 to 2004)

Judge Advocate General Corps at U.S. Army Reserve (1984 to 1993)

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