2003 NCAA Division I Men's Ice Hockey Tournament

The 2003 NCAA Men's Division I Ice Hockey Tournament involved 16 schools playing in single-elimination play to determine the national champion of men's NCAA Division I college ice hockey. It began on March 28, 2003, and ended with the championship game on April 12. A total of 15 games were played.

The University of Minnesota, coached by Don Lucia, won their fifth NCAA title (7th overall) with a 5-1 victory in the final game over the University of New Hampshire, coached by Dick Umile.

Minnesota forward Thomas Vanek was named the Frozen Four's Most Outstanding Player.

Qualifying teams
The at-large bids and seeding for each team in the tournament was announced on March 23, 2003. The Western Collegiate Hockey Association (WCHA) had five teams receive a berth in the tournament, Hockey East had four teams receive a berth in the tournament, the Central Collegiate Hockey Association (CCHA) had three teams receive a berth in the tournament, the ECAC had two berths, while both the Metro Atlantic Athletic Conference (MAAC) and College Hockey America (CHA) received one bid for their tournament champions.

Number in parentheses denotes overall seed in the tournament.

First round and regional finals

 * East – Dunkin' Donuts Center, Providence, Rhode Island
 * Midwest – Yost Ice Arena, Ann Arbor, Michigan
 * Northeast – Centrum Centre, Worcester, Massachusetts
 * West – Mariucci Arena, Minneapolis, Minnesota

Frozen Four

 * HSBC Arena, Buffalo, New York

Tournament Bracket
Note: * denotes overtime period(s)

==Regional Semifinals ==

(1) Minnesota vs. (2) Ferris State
==Frozen Four ==

(W1) Minnesota vs. (NE1) New Hampshire
==All-Tournament Team == * Most Outstanding Player(s)
 * G: Travis Weber (Minnesota)
 * D: Paul Martin (Minnesota)
 * D: Matt DeMarchi (Minnesota)
 * F: Steve Saviano (New Hampshire)
 * F: Thomas Vanek* (Minnesota)
 * F: Nathan Martz (New Hampshire)