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All 35 seats in theIdaho Senate 18 seats needed for a majority | |||||||||||||||||||||||||||||||
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 Results: Republican hold Democratic hold | |||||||||||||||||||||||||||||||
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| Elections in Idaho | ||
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The2020 Idaho Senate election took place as part of thebiennial2020 United States elections.Idaho voters elected state senators in all of the state's 35 senate districts. State senators serve two-year terms in theIdaho Senate.
No seats changed hands in the election, with the closest, theMoscow-based District 5, being within one percentage point of flipping.
Six incumbents did not run for re-election in 2020. Those incumbents are:
| Source | Ranking | As of |
|---|---|---|
| The Cook Political Report[1] | Safe R | October 21, 2020 |
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| Party | Candidates | Votes | Seats | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. | % | Before | Up | Won | After | +/– | ||||||||
| Republican | 34 | 284,487 | 60.22% | 28 | 28 | 28 | 28 |  | ||||||
| Democratic | 16 | 159,391 | 33.74% | 7 | 7 | 7 | 7 | | ||||||
| Independent | 3 | 22,101 | 4.68% | 0 | 0 | 0 | 0 | | ||||||
| Libertarian | 1 | 4,916 | 1.04% | 0 | 0 | 0 | 0 | | ||||||
| Constitution | 1 | 1,528 | 0.32% | 0 | 0 | 0 | 0 | | ||||||
| Total | 472,423 | 100.0% | 35 | 35 | 35 | 35 | | |||||||
| Source:Idaho Elections Results | ||||||||||||||
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| District | Winner | Margin |
|---|---|---|
| District 5 | Democratic | 0.88% |
| District 15 | Republican | 5.98% |
| District 26 | Democratic | 12.7% |
State ofIdaho | |
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Boise (capital) | |
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