The tables below indicate the political party affiliation of elected officials in the U.S. State of Michigan from statehood through January 2011.
Officials listed include: Governors, Lieutenant Governors, Secretaries of State, Attorneys General and State Treasurers. The tables also indicate the historical party composition in the State Senate, State House of Representatives, the names and party affiliations of Michigan's U.S. Senators, and the party composition of Michigan's delegations to the U.S House of Representatives. For years in which a presidential election was held, the tables show which party's nominees received the State's electoral votes.
The parties are indicated as follows: Democratic (D), Republican (R), and Whig (W), with purple designating a tie between two parties.
20th century – 1900 to 1964
In 1963, the Michigan Constitution was rewritten, modifying the statewide elected positions.