Associate Justice Currently Seated

William G. Montgomery

Arizona Supreme Court

Portrait of William G. Montgomery
Education and employment

Prior to Justice William G. Montgomery’s appointment to the Arizona Supreme Court in 2019, he served as the Maricopa County Attorney beginning with a special election in 2010. Before assuming elected office, Justice Montgomery served as a Deputy County Attorney, as well as practicing civil law with a local insurance defense firm and advocacy work on behalf of victims of crime. Justice Montgomery earned a B.S. degree and received a commission as a Second Lieutenant in the Army from the United States Military Academy at West Point in 1989. He received his law degree from Arizona State University in 2001.

Judicial record

167 opinions where William G. Montgomery sat on the panel, spanning 2020–2026.

28 Majority authored
139 Joined majority

By court

  • Ariz. 167

By disposition

  • Affirmed 59
  • Reversed 43
  • Mixed 24
  • Vacated 20
  • Remanded 5
  • Granted 1

Panel votes per year

How William G. Montgomery's panel-seat count has shifted year by year. Add ?vs=<another-judge-slug> to the URL to overlay a second judge, or click compare next to any co-panelist below.

0 8 16 24 32 40 2020 2022 2024 2026 2020: 21 votes — William G. Montgomery 2021: 23 votes — William G. Montgomery 2022: 34 votes — William G. Montgomery 2023: 23 votes — William G. Montgomery 2024: 24 votes — William G. Montgomery 2025: 29 votes — William G. Montgomery 2026: 13 votes — William G. Montgomery
  • William G. Montgomery

Most-frequent co-panelists

Judges who appeared on the same opinions, ranked by overlap count. Click compare to overlay them on the chart above.

Recent opinions

15 most recent opinions where William G. Montgomery sat on the panel.

Docket Court Filed Disposition Case
CV-25-0089-PR Ariz. 2026-07-17 Affirmed in part REPUBLICAN NATL COMMITTEE v. FONTES
CV-25-0116-PR Ariz. 2026-07-17 Reversed in part and remanded Gelvin v. Hon. parker/gelvin
CV-25-0033-PR Ariz. 2026-07-17 Reversed and remanded GOLDWATER v. PHOENIX
CV-25-0009-PR Ariz. 2026-07-07 Affirmed MAYWALD v. TOYOTA
CV-24-0140-PR Ariz. 2026-07-06 Affirmed State Farm v. Balzan
CV-24-0295-PR Ariz. 2026-06-29 Affirmed in part, reversed in part, remanded CENTER FOR AZ v. AZ SECRETARY OF STATE
CV-25-0036-PR Ariz. 2026-06-17 Reversed and remanded MARKHAM v. CAHAVA
CR-24-0237-PR Ariz. 2026-05-15 Affirmed State of Arizona v. Dimitri Polanco Romero
CV-24-0267-PR Ariz. 2026-04-28 Vacated Chandler v. Roosevelt
CV-25-0161-PR Ariz. 2026-04-27 Vacated and remanded Briana Hernandez v. Luis Arturo Loarca
CV-24-0288-PR Ariz. 2026-03-03 Reversed and remanded 9w Halo v. Ador
CV-24-0275-PR Ariz. 2026-02-11 Affirmed In Re: Mh2023-004502
CR-24-0300-PR Ariz. 2026-01-30 Reversed and remanded State of Arizona v. Hon. marner/haniffa
CR-24-0064-PR Ariz. 2025-12-12 Reversed State of Arizona v. hon.gordon/owen
CV-24-0220-T/AP Ariz. 2025-12-04 Affirmed Knight v. Fontes