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
174 opinions where William G. Montgomery sat on the panel, spanning 2020–2026.
By court
By disposition
Panel votes per year
How William G. Montgomery's panel-seat count has shifted year by year. Overlaid with Ann A. Scott Timmer for comparison (drop the overlay).
- William G. Montgomery
- Ann A. Scott Timmer
Most-frequent co-panelists
Judges who appeared on the same opinions. aligned = same bucket (both majority, both dissent); partial = concurred in result but wrote separately; split = the meaningful disagreement (majority vs dissent).
- Ann A. Scott Timmer 169 shared 158 aligned 3 partial 8 split compare
- Clint Bolick 165 shared 155 aligned 10 split compare
- John R. Lopez IV 162 shared 159 aligned 1 partial 2 split compare
- James P. Beene 160 shared 157 aligned 1 partial 2 split compare
- Robert M. Brutinel 116 shared 116 aligned compare
- Kathryn H. King 97 shared 95 aligned 1 partial 1 split compare
- Andrew W. Gould 27 shared 26 aligned 1 split compare
- Maria Elena Cruz 17 shared 15 aligned 1 partial 1 split compare
- Garye L. Vásquez 2 shared 2 aligned compare
- Peter J. Eckerstrom 2 shared 2 aligned compare
Recent opinions
15 most recent opinions where William G. Montgomery sat on the panel.
| Docket | Court | Filed | Disposition | Case |
|---|---|---|---|---|
| CV-25-0287-PR | Ariz. | 2026-07-30 | Affirmed | McMahan v. Grasshopper |
| CV-25-0213-PR | Ariz. | 2026-07-30 | Affirmed | DOE v. THE CORPORATION |
| CV-24-0252-PR | Ariz. | 2026-07-29 | Reversed and remanded | GALLERY v. K HOVNANIAN |
| CV-25-0217-PR | Ariz. | 2026-07-24 | Affirmed | A & P RANCH LTD v. COCHISE COUNTY |
| 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-25-0203-PR | Ariz. | 2026-06-01 | Affirmed in part, reversed in part and remanded | State of Arizona v. Ricky Alonzo Hippensteel |
| CV-25-0070-PR | Ariz. | 2026-05-22 | Affirmed | STEPHENS v. STATE |
| 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 |