The rock group's Radioactive passed Jason Mraz's 76-week record on Wednesday, while Awolnation's Sail ties the singer/songwriter with 76 weeks on the countdown.
Imagine Dragons frontman Dan Reynolds tells Billboard.com he's stunned by the record: "It's unbelievable. There are few things more satisfying as an artist than seeing your music have longevity. But, we could never have expected to see one of our songs have legs like this.
"People seem to be connecting to it in personal ways, which is exactly what we hoped for.
"We've been out on the road and focused on touring for a long time. Somewhere along the way, we started to realise the song was taking on a life of its own."
Radioactive started its impressive run on the chart in September, 2012. It reached number three - its highest position - last August.
