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State profile

Idaho elections & voting

Electoral votes, voting rules, and presidential results for Idaho.

How Idaho votes

In 2024, Idaho voted Republican. It has backed the Republican Party in its last 6 consecutive elections.

4
electoral votes
Voter IDNo-excuse absenteeEarly votingSame-day registrationAutomatic registration

Voting rules

Photo ID Requested
Active

Photo ID requested; affidavit available

Voter ID
Effective: 2010
No-Excuse Absentee
Active

Any voter can request absentee ballot

Mail-In Voting
Effective: 2012
14 Days Early Voting
Active

Early voting available 14 days before election

Early Voting
Effective: 2006
Same-Day Registration
Active

Register and vote on Election Day

Same-Day Registration
Effective: 1994

Election history

How Idaho has voted in presidential elections.

  • 2024RepublicanDonald Trump4 EV
  • 2020RepublicanDonald Trump4 EV
  • 2016RepublicanDonald Trump4 EV
  • 2012RepublicanMitt Romney4 EV
  • 2008RepublicanJohn McCain4 EV
  • 1920RepublicanWarren G. Harding4 EV
  • 1916DemocraticWoodrow Wilson4 EV
  • 1912DemocraticWoodrow Wilson4 EV
  • 1908RepublicanWilliam Howard Taft3 EV
  • 1904RepublicanTheodore Roosevelt3 EV
  • 1900DemocraticWilliam Jennings Bryan3 EV
  • 1896DemocraticWilliam Jennings Bryan3 EV
  • 1892PopulistJames B. Weaver3 EV

Timeline

2020s

2024
Election
Republican
major

2024 Presidential Election

Donald Trump won ID with 4 electoral votes

2020
Election
Republican
major

2020 Presidential Election

Donald Trump won ID with 4 electoral votes

2010s

2016
Election
Republican
major

2016 Presidential Election

Donald Trump won ID with 4 electoral votes

2012
Rule Change
Mail Voting
major

No-Excuse Absentee

Any voter can request absentee ballot

2012
Election
Republican
major

2012 Presidential Election

Mitt Romney won ID with 4 electoral votes

2010
Rule Change
Voter ID
major

Photo ID Requested

Photo ID requested; affidavit available

2000s

2008
Election
Republican
major

2008 Presidential Election

John McCain won ID with 4 electoral votes

2006
Rule Change
Early Voting
moderate

14 Days Early Voting

Early voting available 14 days before election

1990s

1994
Rule Change
Same-Day Registration
moderate

Same-Day Registration

Register and vote on Election Day

1920s

1920
Election
Republican
major

1920 Presidential Election

Warren G. Harding won ID with 4 electoral votes

1910s

1916
Election
Democratic
major

1916 Presidential Election

Woodrow Wilson won ID with 4 electoral votes

1912
Election
Democratic
major

1912 Presidential Election

Woodrow Wilson won ID with 4 electoral votes

1900s

1908
Election
Republican
major

1908 Presidential Election

William Howard Taft won ID with 3 electoral votes

1904
Election
Republican
major

1904 Presidential Election

Theodore Roosevelt won ID with 3 electoral votes

1900
Election
Democratic
major

1900 Presidential Election

William Jennings Bryan won ID with 3 electoral votes

1890s

1896
Election
Democratic
major

1896 Presidential Election

William Jennings Bryan won ID with 3 electoral votes

1892
Election
Populist
major

1892 Presidential Election

James B. Weaver won ID with 3 electoral votes

This site explains the structure and history of U.S. federal elections and is not an official government resource. All data shown is for educational purposes only.