Arizona voters approved Proposition 139 on November 5, 2024 with 61.6% of the vote, adding a constitutional right to abortion until fetal viability — approximately 24 weeks — to the Arizona Constitution. The amendment also protects earlier abortions and bans on contraception as violations of state law. These facts are confirmed by Arizona election results, Fox News, NPR, CNN, and AZCentral.

The ballot measure came after a tumultuous year for abortion in Arizona. In April 2024, the Arizona Supreme Court ruled that an 1864 territorial law — passed before Arizona was a state and before women could vote — was enforceable and would ban nearly all abortions with no exceptions for rape or incest. The ruling sparked immediate controversy across the political spectrum. Within weeks, the Arizona state legislature passed a repeal of the 1864 law, with several Republican legislators joining Democrats to support the repeal. Governor Katie Hobbs signed it in May 2024.

With the 1864 law repealed, Arizona had reverted to a 15-week abortion ban passed in 2022. Proposition 139 went further, extending abortion access to viability and overriding both the 15-week ban and any future legislative restrictions. The 61.6% margin exceeded the 60% threshold in Florida, making Arizona's result a constitutional success where Florida's fell short.

NPR and Arizona Democrats called the vote a historic restoration of reproductive rights. Fox News and pro-life groups noted that Prop 139 still allowed abortion regulations after viability for health reasons, arguing it was not as absolute as proponents claimed. Both sides agreed the constitutional amendment passed and would govern Arizona abortion law going forward.