The following table indicates the parties of elected officials in the U.S. state of Idaho:
The table also indicates the historical party composition in the:
For years in which a presidential election was held, the table indicates which party's nominees received the state's electoral votes.
The parties are as follows: <small>(D)</small>, (D/P), (D/P/SR), (D/SR), <small>(I)</small>, (P), <small>(R)</small>, (S), (SR), and .