There have been 145 vacancies in state legislatures in 2021, with vacancies occurring across 45 states.
Seventy-four (74) vacancies have occurred in seats held by Republicans, and 72 vacancies have occurred in seats held by Democrats. Zero vacancies have occurred in seats held by independents.

States with the highest number of vacancies include Arizona (11), New Hampshire (8), Oregon (8), Maryland (7), and Illinois (6).
One hundred and eight (108) of those vacancies have been filled. The process for filling state legislative vacancies varies from state to state. Twenty-five states require special elections, 10 states require the governor to appoint, seven states require the board of county commissioners to appoint, three states require the state’s political party to appoint, three states have a hybrid system, and one state requires the legislative chamber to vote on a replacement.
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