The 2026 Horizon League Men's Basketball Tournament will be the final event of the 2025–26 men's basketball season for the Horizon League. It will be held from March 2–10, 2026; play-in and first round games will be played at the home courts of the better seeds, with all remaining games held at Corteva Coliseum in Indianapolis, Indiana. The winner will receive the conference's automatic berth into the NCAA Tournament. The tournament is sponsored by Barbasol for the fourth consecutive year.