Incumbent Kevin Thompson (R), Jonathon Hill (D), Clara Pratte (D), Ralph Heap (R), and Mike Cease (G) are running in the general election for the Arizona Corporation Commission on November 3, 2026. The two candidates who receive the most votes will be elected.

The commission is responsible for regulating state utilities, including water, gas, and electricity. This includes determining whether a utility company can increase the rate it charges.

Four major party candidates are running:

• Kevin Thompson (R) is an incumbent first elected in 2022. His campaign website says he has "served as a voice for ratepayers, ensuring they are protected from utility waste, special interest handouts that increase your bills, while making sure our energy grid and water systems remain affordable and reliable."
• Jonathon Hill (D) is an engineer. On his campaign website, he said he wants "to restore the ACC as a fair, transparent body that prioritizes the people of Arizona over corporate interests."
• Clara Pratte (D) is a business owner. Her campaign website says she "is dedicated to lowering utility costs for everyday Arizonans, creating jobs and expanding energy independence in our state. She believes it's past time to restore integrity to the Arizona Corporation Commission and to put your best interests first."
• Ralph Heap (R) was elected to the Arizona House of Representatives for District 10 in 2025. His campaign website says he wants "to put ratepayers first: push back on ESG and California-style energy schemes, keep utility bills from punishing families and seniors, protect a reliable and diverse grid, and stand up for rural water and infrastructure with real transparency—not special-interest deals."

To read more about what issues they are campaigning on, click here.

Arizona Capitol Times' Reagan Priest wrote, "Concerns about who will bear the financial burden of data centers are rising, but Corporation Commission candidates are split over whether Arizona ratepayers are footing the bill for large load user growth."

Thompson says the commission "has done its job of shielding ratepayers from costs associated with servicing data centers and other large load users. ... The commission cannot tell a utility or a developer 'No' when it comes to building and servicing a data center ... That is the role of local zoning boards, the legislature or the governor." Both Democrats have been critical of the commission's handling of the issue, and Pratte said at a debate, "If you elect [Hill and Pratte] in November, as soon as we take office, we will ... immediately require [Arizona Public Service] to open their books and immediately require all the utilities to show us where our money is going." Heap told the Arizona Capitol Times in May that he supported data center growth.

Republicans hold all five seats on the commission. The last time a Democrat won a seat on the commission was in 2020. If Democrats win both seats, the commission will still be made up of a Republican majority. However, winning both seats would mean that in 2028, Democrats would need to win only one of the seats up for election, rather than all three. Democrats last had a majority on the commission in 1997.

Mike Cease (G) is also running.

In the July 21 primary, Heap defeated incumbent Nick Myers (R) for the nomination. Myers was one of three utility regulation commissioners nationwide to lose a primary. There are elections for a similar body in nine states in November.