The Smoke + Mirrors Tour was the second worldwide concert tour by American alternative rock band Imagine Dragons in support of their second studio album Smoke + Mirrors (2015). The tour had a preview show in Sydney, Australia, on March 17, 2015, before the tour officially began in Santiago, Chile, on April 12, 2015. It continued through the Americas, Asia, Oceania and Europe until February 5, 2016, in Amsterdam, Netherlands. The band played 108 shows. For Pollstar's Year End Top 200 North American Tours of 2015, it was ranked forty-first, and grossed $25.2 million.

Imagine Dragons are an American pop rock band formed in 2008, based in Las Vegas, Nevada, and currently consisting of lead singer Dan Reynolds, guitarist Wayne Sermon, bassist Ben McKee and drummer Daniel Platzman. The band first gained exposure with the release of their single "It's Time", followed by their debut album Night Visions (2012), which resulted in the chart-topping singles "Radioactive" and "Demons". Rolling Stone named "Radioactive", which held the record for most weeks charted on the Billboard Hot 100, the "biggest rock hit of the year". MTV called them "the year's biggest breakout band", and Billboard named them their "Breakthrough Band of 2013" and "Biggest Band of 2017", and placed them at the top of their "Year in Rock" rankings for 2013, 2017, and 2018. Imagine Dragons topped the Billboard Year-End "Top Artists – Duo/Group" category in 2018.