Ranked choice voting has been adopted in U.S. cities in 10 states. It is used by overseas and military voters to vote in places with runoff elections in another five states. Over 50 U.S. colleges and universities use ranked choice voting to elect student government officers. Internationally, it is used by every voter in six countries and in local elections in many more. Ranked choice voting is recommended for private organizations by Roberts Rules of Order, and many private organizations use it, including the Academy Awards in both nominating and selecting the winner for its prestigious awards.
Visit the “Where it’s Used” page of the Resource Center for a comprehensive list of jurisdictions that use ranked choice voting.
(this text from the Ranked Choice Voting Resource Center: https://www.rankedchoicevoting.org)