Summerfest 2026 is a mere eight months away, and the headliner announcements are HEATING UP. Garth Brooks will play not one, but TWO Summerfest kick-off shows. Ed Sheeran will play. And on Monday, Summerfest announced yet another headliner: Post Malone!
The wildly popular musician we sometimes get mixed up with Machine Gun Kelly will play Summerfest’s American Family Insurance Amphitheater on Saturday, June 27, 2026. He’ll be joined by Carter Faith.
Tickets go on sale Friday, October 17 at 10 a.m. at Summerfest.com, Ticketmaster.com, or in person at the American Family Insurance Amphitheater. Tickets include day-of general admission to Summerfest.
Summerfest 2026 is set to run June 18-20, June 25-27, and July 2-4. (Yep, it’s the same Thursday-Saturday deal.) A total of 602,231 folks attended Summerfest 2025—an approximate 8% increase from 2024.
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