Partisan Voting Index for Counties in Idaho

This Map Displays the Partisan Voting Index Value for each county in Idaho. 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 2020 and 2016 presidential election. Of the 44 Counties in Idaho The County with the highest Republican PVI is Bear Lake County at +32. The County with the highest Democrat PVI is Blaine County at +17.

Map List Related

Map of Partisan Voting Index (PVI) for Counties in Idaho

Rep +20
Rep. 15-19
Rep. 10-14
Rep. 5-9
Rep. 1-4
Dem 1-4
Dem 5-9
Dem 10-14
Dem 15-19
Dem +20

List of All Counties in Idaho With Partisan Voting Index (2020 Presidential Election Results)

Map KeyNamePartisan Voting Index (2020)
Ada CountyRepublican +1
Adams CountyRepublican +23
Bannock CountyRepublican +5
Bear Lake CountyRepublican +32
Benewah CountyRepublican +26
Bingham CountyRepublican +21
Blaine CountyDemocrat +17
Boise CountyRepublican +21
Bonner CountyRepublican +16
Bonneville CountyRepublican +15
Boundary CountyRepublican +26
Butte CountyRepublican +30
Camas CountyRepublican +19
Canyon CountyRepublican +17
Caribou CountyRepublican +30
Cassia CountyRepublican +28
Clark CountyRepublican +29
Clearwater CountyRepublican +27
Custer CountyRepublican +25
Elmore CountyRepublican +20
Franklin CountyRepublican +30
Fremont CountyRepublican +27
Gem CountyRepublican +28
Gooding CountyRepublican +25
Idaho CountyRepublican +30
Jefferson CountyRepublican +30
Jerome CountyRepublican +21
Kootenai CountyRepublican +19
Latah CountyDemocrat +1
Lemhi CountyRepublican +25
Lewis CountyRepublican +28
Lincoln CountyRepublican +22
Madison CountyRepublican +18
Minidoka CountyRepublican +25
Nez Perce CountyRepublican +14
Oneida CountyRepublican +31
Owyhee CountyRepublican +29
Payette CountyRepublican +27
Power CountyRepublican +15
Shoshone CountyRepublican +17
Teton CountyDemocrat +1
Twin Falls CountyRepublican +19
Valley CountyRepublican +5
Washington CountyRepublican +26