Tracking Arizona's Constitution

State constitutions are amended far more frequently than the U.S. Constitution. While the U.S. Constitution has been amended only 27 times (and only 17 times since 1791), the nation’s state constitutions have been amended at least 7,000 times in all. Arizona is no exception. Since the Arizona Constitution’s ratification in 1910, the document has been amended 162 times, resulting in more than 200 textual modifications. In other words, the Arizona Constitution reflects not just the work of its nineteenth century drafters, but the ongoing work of generations of Arizonans ever since.

This website allows you to explore the Arizona Constitution in two ways: by provision, allowing you to view the current text and history of every article and section of the constitution’s text; and by year, allowing you to view amendments and their context by year of adoption.

Arizona Constitution data last updated June 28, 2025.

162
Amendments
Since 1912
1920
1930
1940
1950
+45 1960
1970
1980
1990
+10
2000
2010
2020

Each block on this histogram represents a change—e.g., a substantive change, repeal & replace, or renumbering—to an individual section rather than an amendment. Some amendments result in multiple changes, resulting in multiple blocks being attributed to one amendment. Likewise, a section may be amended more than once in an year, but these amendments will only appear as one block on the histogram. When a block or blocks are marked red in a specific year, that means that a new constitution went into effect that year.

Explore by Provision

The Constitution’s provisions are organized into articles, and each article is split into sections. Here, you can view an outline of the Constitution, see the Constitution’s full text as it stood on any date since ratification, and compare any amended provision of the Constitution to its earlier version.

Explore by Year

View the constitution’s amendments by year of adoption and historical context for significant amendments.

The Arizona Constitution & Its Amendments

Arizona had one of the longest roads to statehood in the nation. Originally a part of the New Mexico Territory, the Arizona Territory was established in 1863. The relative sparsity of Anglo-American residents in the territory stood as a major barrier to the state’s admission to the Union. However, the territory nonetheless began lobbying for statehood as early as 1872. Nearly 20 years later, in 1891, residents of the territory organized a convention, drafted a constitution, and petitioned Congress for admission. This petition was denied, and in 1903, Congress proposed admitting the New Mexico and Arizona Territories as a single state. Arizonans opposed the idea, in part due to the different racial demographics of the two territories. Having rejected Congress’s proposal, Arizona was not authorized to become a state until 1910.

The Arizona Enabling Act placed numerous restrictions on the contents of the Arizona Constitution. These restrictions assuaged Congressional and presidential fears of the “rising tide of radicalism in the West,” a movement exemplified by the Oklahoma Constitution’s inclusion of the initiative and referendum power, Oregon’s adoption of the recall power, and Colorado’s push for direct primaries and railroad regulation. The enabling act also required the inclusion of certain provisions in the state’s constitution, such as a prohibition against polygamy and conditions for the management of federally-granted lands, and directed the convention to draft these provisions in a way that would prevent future amendments without Congress’s consent

The final barrier to Arizona’s statehood was an attempt to include the recall power, including recall of judges, in the Arizona Constitution. Anticipating President Taft’s opposition to the provision, Congress made Arizona statehood conditional on an immediate popular vote on whether to retain the judicial recall provision. But Taft was dissatisfied with this compromise, as it allowed the possibility that the judicial recall provision would remain in the constitution, and vetoed the resolution admitting Arizona to the Union. Congress then conditioned Arizona’s admission on voters rejecting the judicial recall provision. With this condition looming, voters overwhelmingly approved an amendment exempting judges from the recall provision and Arizona finally became a state on February 14, 1912.

The Arizona Constitution can be amended in three ways: legislative proposal, citizen initiative, and constitutional convention. Legislatively proposed amendments must be approved by a majority of members of both chambers of the legislature. Initiated amendment proposals must gather the signatures of qualified electors equal to 15 percent of votes in the last gubernatorial race. Finally, the legislature may call a constitutional convention, which may propose amendments or a new constitution. All three methods require that proposals be approved by a majority of voters voting on the proposal.

Arizona State Capitol, Phoenix. Warren LeMay.

Additional Resources

Access links to commonly referenced sources in Arizona constitutional research.