The 2025 Missouri Valley Conference Men's Basketball Tournament, popularly referred to as "Arch Madness", is a postseason men's basketball tournament that will complete the 2024–25 season in the Missouri Valley Conference.

The tournament will be held at the Enterprise Center in St. Louis, Missouri from March 6–9, 2025.

Teams are seeded by conference record, with ties broken by the overall record in conference games played between the tied teams, then (if necessary) by comparison of records between the tying institutions versus the top team in the standings (and continuing from top to bottom of standings, as necessary, with the team having the better record against that team receiving the better seed).

The top four seeds receive opening–round byes.

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