Illinois is the fifth studio album by the American singer-songwriter Sufjan Stevens. It features songs referencing places, events, and persons related to the U.S. state of Illinois. Illinois is Stevens' second based on a U.S. state, part of a planned series of fifty that began with the 2003 album Michigan and that Stevens has since acknowledged was a joke. It was adapted into a musical, Illinoise, in 2023 and, after playing smaller venues, opened at the St. James Theatre on Broadway and was nominated for four Tony Awards in 2024, winning for Best Choreography.