Skip to content

William S. Dato

CA · Associate Justice, California Court of Appeal, Fourth Appellate District, Division One

Official website

Dato has served as an associate justice in Division One of California's Fourth District Court of Appeal since 2017. He previously served for 13 years as a San Diego Superior Court judge.

Campaign finance information not available

Track record

Track record — General

General · 2 records
  • Was confirmed as an associate justice of the Fourth District Court of Appeal, Division One.

    February 1, 2017

    Source: appellate.courts.ca.gov

  • Was appointed to the San Diego County Superior Court.

    January 1, 2004

    Source: appellate.courts.ca.gov

Track record — Legal Competence

Legal Competence · 31 favorable
  • Joined In re Moore, vacating a child-abuse murder conviction because later scientific developments showed material expert testimony was false.

    September 8, 2026Favorable on Legal Competence

    Source: law.justia.com

  • Authored Ashirwad v. Bradbury, affirming that pandemic-era payments did not create a month-to-month commercial tenancy.

    January 29, 2026Favorable on Legal Competence

    Source: law.justia.com

  • Joined McDoniel v. Kavry Management, upholding wrongful-discharge liability for firing an employee based on a compelled polygraph.

    September 30, 2025Favorable on Legal Competence

    Source: law.justia.com

  • Completed his second term on the Commission on Judicial Performance.

    February 28, 2025Favorable on Legal Competence

    Source: supreme.courts.ca.gov

  • Authored In re H.D., ordering a new Racial Justice Act hearing that could consider reliable aggregate policing data.

    February 14, 2024Favorable on Legal Competence

    Source: law.justia.com

  • Authored Sarmiento v. Superior Court, directing approval of mental-health diversion for an attempted-robbery defendant.

    January 9, 2024Favorable on Legal Competence

    Source: law.justia.com

  • Joined Marriage of D.H. and B.G., reversing a child-support ruling that used the wrong definition of full-time high-school attendance.

    January 17, 2023Favorable on Legal Competence

    Source: law.justia.com

  • Joined County of San Diego v. Commission on State Mandates, upholding denial of reimbursement for youth-offender parole laws.

    January 1, 2023Favorable on Legal Competence

    Source: law.justia.com

  • Dissented in People v. Zemek, concluding public-trial and juror-misconduct errors required a new murder trial.

    January 1, 2023Favorable on Legal Competence

    Source: law.justia.com

  • Joined 640 Tenth v. Newsom, rejecting procedural and takings challenges to pandemic business restrictions.

    May 13, 2022Favorable on Legal Competence

    Source: law.justia.com

  • Joined People v. Harden, affirming denial of a felony-murder resentencing petition based on the prior appellate ruling.

    March 11, 2022Favorable on Legal Competence

    Source: law.justia.com

  • Joined Flores v. City of San Diego, reversing summary judgment because the city had not shown compliant police-pursuit training.

    January 1, 2022Favorable on Legal Competence

    Source: law.justia.com

  • Was reappointed to the Commission on Judicial Performance for a second term.

    March 1, 2021Favorable on Legal Competence

    Source: cjp.ca.gov

  • Authored Felczer v. Apple, correcting the date from which postjudgment interest on litigation costs accrued.

    January 1, 2021Favorable on Legal Competence

    Source: law.justia.com

  • Authored In re Edgerrin J., reversing juvenile judgments for a renewed hearing on whether police lawfully detained and searched three Black teenagers.

    November 20, 2020Favorable on Legal Competence

    Source: law.justia.com

  • Joined Lief v. Superior Court, granting writ relief from a family-law discovery order.

    December 6, 2018Favorable on Legal Competence

    Source: law.justia.com

  • Was appointed by the California Supreme Court as the appellate-court member of the Commission on Judicial Performance.

    April 1, 2018Favorable on Legal Competence

    Source: cjp.ca.gov

  • Was confirmed as an associate justice of the Fourth District Court of Appeal, Division One.

    February 1, 2017Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Served as presiding judge of the San Diego Superior Court's appellate division.

    January 1, 2014Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Served as supervising judge of the San Diego Superior Court's North County branch.

    January 1, 2012Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Handled juvenile drug-court assignments on the San Diego County Superior Court.

    January 1, 2009Favorable on Legal Competence

    Source: cjp.ca.gov

  • Handled adult drug-court assignments on the San Diego County Superior Court.

    January 1, 2008Favorable on Legal Competence

    Source: cjp.ca.gov

  • Handled family-law assignments on the San Diego County Superior Court.

    January 1, 2007Favorable on Legal Competence

    Source: cjp.ca.gov

  • Handled criminal assignments on the San Diego County Superior Court.

    January 1, 2006Favorable on Legal Competence

    Source: cjp.ca.gov

  • Handled civil assignments on the San Diego County Superior Court.

    January 1, 2005Favorable on Legal Competence

    Source: cjp.ca.gov

  • Was appointed to the San Diego County Superior Court.

    January 1, 2004Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Taught products liability as an adjunct professor at California Western School of Law.

    January 1, 2000Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Taught appellate practice as an adjunct professor at the University of San Diego School of Law.

    January 1, 1995Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Became a certified appellate law specialist in private practice.

    January 1, 1990Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Worked as an appellate staff attorney for the California Court of Appeal.

    January 1, 1985Favorable on Legal Competence

    Source: appellate.courts.ca.gov

  • Worked as an appellate staff attorney for the California Supreme Court.

    January 1, 1981Favorable on Legal Competence

    Source: appellate.courts.ca.gov

Track record — Candidate Ethics

Candidate Ethics · 3 records
  • Completed his second term on the Commission on Judicial Performance.

    February 28, 2025

    Source: supreme.courts.ca.gov

  • Was reappointed to the Commission on Judicial Performance for a second term.

    March 1, 2021

    Source: cjp.ca.gov

  • Was appointed by the California Supreme Court as the appellate-court member of the Commission on Judicial Performance.

    April 1, 2018

    Source: cjp.ca.gov

Retention question · November 3, 2026