Illinois (styled Sufjan Stevens Invites You To: Come On Feel the Illinoise on the cover; sometimes written as Illinoise) is a 2005 concept album by American indie folk songwriter Sufjan Stevens. It is his fifth studio album, and 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 that Stevens has since acknowledged was a gag.