The following tables indicate the historic party affiliation of elected officials in the U.S. state of Wyoming including: *Governors, Secretaries of State, State Auditors, State Treasurers and Superintendents of Public Instruction. The tables also indicate the historical party composition in the: State Senate, State House of Representatives, State delegation to the United States Senate and State delegation to the United States House of Representatives. For years in which a United States presidential election was held, the tables indicate which party's nominees received the State's electoral votes. Prior to statehood in 1889, there were fewer elected offices, as indicated.
The parties are labeled as follows: Democratic (D), Independent (I), unknown other party (O), Populist (P), Republican (R), and a tie or coalition within a group of elected officials.