"Believer" is a song by American rock band Imagine Dragons. The song was released on February 1, 2017 through Interscope Records and Kidinakorner as the lead single from the band's third studio album, Evolve (2017). It was written by Dan Reynolds, Wayne Sermon, Ben McKee, Daniel Platzman, Justin Tranter and its producers Mattman & Robin.

"Believer" peaked at number four on the US Billboard Hot 100, becoming the band's third top ten single after "Radioactive" and "Demons" in that country. It also reached the top ten in Austria, Canada, Czech Republic, France, Italy, Poland, Portugal, and Switzerland. The song played heavily on advertisements such as for Nintendo's Nintendo Switch and various movie trailers and television shows. It became the fifth best-selling song of 2017 in the United States