Hon. Margaret M. Grignon

Hon. Margaret M. Grignon

California Court of Appeal, Second District, Retired

Recognized as an excellent settlement judge on the Superior Court, Justice Grignon continued to settle a multitude of cases on the Court of Appeal. She was named one of the Daily Journal’s 2010 Top Women Litigators, one of only three appellate lawyers on that list. She has become a popular ARC neutral in complex matters. Justice Grignon spearheads ARC’s Appellate Evaluation and Consultation Program by providing pre-appellate argument analysis of briefs and oral argument as well as post-trial dispute resolution.


  • Member or former member: National Assn. of Women Judges; California Women Judges Assn; American Bar Assn.; Los Angeles County, San Diego County, and Antelope Valley Bar Assns
  • Author of numerous published articles on tax and business law
  • Frequent lecturer at educational programs for judges and attorneys; active in the administration of the judicial system; judge of various law school moot court competitions; and consultant for CLE publications


Business/commercial, complex litigation, construction defect, employment, family law, insurance coverage and bad faith, intellectual property, legal and medical malpractice and personal injury


Justice Margaret M. Grignon recently retired from the California Court of Appeal, Second District, Division Five, where she spent 14 years and authored more than 2,200 opinions, including 160 which have been published. Justice Grignon has a reputation as a dedicated, hardworking jurist who demonstrates caring and concern for all parties. She is also described as thorough and extremely bright, with an impressive knowledge of the law. Justice Grignon’s instinctual ability to read between the lines and identify key issues has made her very successful in bringing cases to closure.

After graduating first in her class at Loyola Law School, Justice Grignon began her legal career as a clerk for Justice Robert Thompson of the 2nd District. As an attorney, she specialized in tax and business law with O’Melveny & Myers and Gray, Cary, Ames & Frye, and later opened her own private practice in Palmdale.

Justice Grignon was appointed to the Antelope Municipal Court in 1984 and elevated to the Los Angeles Superior Court in 1987. In 1990, Justice Grignon was appointed to the Court of Appeal.


  • J.D., 1977, Loyola University School of Law, summa cum laude
  • 1972-74, University of Zurich, studied international and Swiss law
  • B.A., 1972, UCLA, Political Science, cum laude

Justice Grignon is available throughout California.

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