Residents in San Tan Valley are at the polls today deciding whether the region will be incorporated, creating the town of San Tan Valley.

Labeled Proposition 495 on the ballot, it will be the largest incorporation in Arizona history if it succeeds, according to a press release from Pinal County.

The county reports that there are 55,081 registered residents eligible to vote in the election, with 10,201 early ballots accepted as of Friday from 37,036 that were mailed.

There are 14 polling locations that will remain open until 7 p.m. Pinal County operates a precinct-based model, so voters must go to their assigned polling locations.

The first results will be released at 8 p.m., and will comprise all early ballots that have been accepted and processed by thhat point.

Results and a live video feed can be viewed at pinal.gov/elections.

The group San Tan Valley Inc. has led a two-year effort to incorporate the region, which is home to an estimated 100,000 people in Pinal County.

If the measure passes, the Pinal County Board of Supervisors will officially incorporate the town and then appoint leaders to get the new government running using $51 million in state-shared revenue.

The county would pass all responsibility for the area to the new town leaders on July 1, 2026.

San Tan Valley incorporation is being supported by some members of the Pinal County Board of Supervisors as well as leaders in some surrounding towns, such as Queen Creek.

This has been the most successful of several attempts at incorporation, as it has made it all the way to the ballot. Other efforts to incorporate San Tan Valley failed in 2004, 2010 and 2017.