Elections / 2020 · Senate · ID
The Republican candidate won Idaho's Senate seat R+29.4.
Idaho, 2020. Party-level statewide totals below — candidate names join when the raw MEDSL store is re-fetched with name columns. The presidential race shared this ballot.
Idaho — 2020 Senate result
Source: MIT Election Data + Science Lab, 1976–2024 Senate returns (party-classified by literal ballot party).
Democratic (D)
285,864
33.2%
Republican (R)
538,446
62.6%
All others
35,517
4.1%
Margin
R+29.4
Idaho's Senate margins
Every contest in our store, 1978–2022
| Year | Margin (D minus R) |
|---|---|
| 1978 | −36.9% |
| 1980 | −1.0% |
| 1984 | −46.2% |
| 1986 | −3.1% |
| 1990 | −22.6% |
| 1992 | −13.0% |
| 1996 | −17.1% |
| 1998 | −41.1% |
| 2002 | −32.6% |
| 2004 | −100.0% |
| 2008 | −23.5% |
| 2010 | −46.3% |
| 2014 | −30.7% |
| 2016 | −38.4% |
| 2020 | −29.4% |
| 2022 | −31.9% |