Partisan Voting Index for Counties in Arizona

This Map Displays the Partisan Voting Index Value for each county in Arizona. The Partisan Voting Index (PVI) is a measurement of how strongly a county leans toward the Democratic or Republican Party. The PVI is calculated by taking the average percentage for the winning party in a county for the last two elections and subtracting that value from the national average for that party in the same two elections. The data is based on results from the 2024 and 2020 presidential election. Of the 15 Counties in Arizona The County with the highest Republican PVI is Mohave County at +28. The County with the highest Democrat PVI is Apache County at +13.