Knotfest is a music festival created by American heavy metal band Slipknot.

Knotfest was officially announced on June 4, 2012. Among the activities, the festival offered as part of its "dark carnival experience" were circus big-top tents, pillars of fire, amusement park rides, burlesque performers, firebreathers, stilt walkers, drum circles made of junkyard cars and graffiti walls.