2025 NCAA Division I men's ice hockey tournament

The 2025 NCAA Division I Men's Ice Hockey Tournament was the national championship tournament for National Collegiate Athletic Association (NCAA) men's Division I college ice hockey in the United States. Held from March 27 to April 12, 2025, the tournament involved 16 teams in single-elimination play to determine the national champion for the top level of play. Western Michigan won their first national championship in program history.

This year's tournament was the first since 2019 to feature multiple programs, Connecticut and Bentley, making their first appearance in the NCAA playoffs.

This year's Frozen Four at Enterprise Center in St. Louis, Missouri, also featured multiple teams, Western Michigan and Penn State, making their first appearance. This last occurred in 2013, when Massachusetts-Lowell, Quinnipiac and St. Cloud State all made their first Frozen Four appearances. Western Michigan also became the first team since Lake Superior State in 1988 to win a championship in their first Frozen Four appearance.

The semifinal matchup between Denver and Western Michigan was the first Frozen Four game to require multiple overtime periods since a 1996 semifinal game between Vermont and Colorado College. With Western Michigan's 3-2 win over Denver in double overtime, they became the first team in NCAA Division I Men's Ice Hockey Tournament history to play in, and win, two multiple-overtime games in the same tournament.