The 2002–03 NHL season was the 86th regular season of the National Hockey League. The Stanley Cup winners were the New Jersey Devils, who won the best of seven series 4–3 against the Mighty Ducks of Anaheim.

The regular season saw several surprises. The San Jose Sharks, who many felt would be one of the elite teams in the West, stumbled early and badly disassembled much of the team. The two-year-old Minnesota Wild, on the other hand, got out to an early start and held onto their first-ever playoff berth throughout the season, winning coach Jacques Lemaire the Jack Adams Award.

The elite teams of previous years such as the Detroit Red Wings, St. Louis Blues, Colorado Avalanche and New Jersey Devils, were joined by two younger Canadian teams, the Ottawa Senators and Vancouver Canucks. The Dallas Stars, which had missed the playoffs the year before, returned as a major power, backed by the record-setting goaltending of Marty Turco.^{[citation needed]}

The most surprising team was probably the Tampa Bay Lightning, which many had predicted to finish last, winning their first Southeast Division title and making the playoffs for the first time in seven years. The most disappointing teams, other than the Sharks, were the New York Rangers, who finished out of the playoffs again despite bearing the league's leading payroll, and the Carolina Hurricanes, who finished last overall after a surprise run to the Stanley Cup Finals the year before. On January 8, 2003, Chicago Blackhawks goaltender Michael Leighton gained a shutout in his NHL debut in a 0–0 tie versus the Phoenix Coyotes. Coyotes goaltender Zac Bierk earned his first career shutout, although it was not his NHL debut. It was the first—and with the abolition of ties two years later, the only—time that two goalies in the same game both earned their first career shutouts.^[1]

At the midpoint of the season, the Canucks led the Western Conference and Ottawa led the East. Vancouver stumbled somewhat over the stretch and lost the Northwest Division title to Colorado and the Western Conference to Dallas. Ottawa continued to dominate, having the best season in franchise history and winning both the Eastern Conference and the Presidents' Trophy.

The season was also marred by financial difficulties. Despite their success, the Ottawa Senators were in bankruptcy protection for almost all of 2003, and at one point could not pay the players. Owner Rod Bryden tried a variety of innovative financing strategies, but these all failed and the team was purchased after the season by billionaire Eugene Melnyk. The Buffalo Sabres also entered bankruptcy protection before being bought by New York businessman Tom Golisano. The financial struggles of the Pittsburgh Penguins continued as the team continued to unload its most expensive players.

The season was marked by a great number of coaches being fired, from Bob Hartley in Colorado to Darryl Sutter in San Jose and Bryan Trottier of the New York Rangers.

Worries over the decline in scoring and the neutral zone trap continued. The season began with an attempted crack down on obstruction and interference, but by the midpoint of the season this effort had petered out.

The NHL Awards presentation took place in Toronto.

Trading deadline: March 11, 2003.^[23] Here is a list of major trades for the 2002–03 NHL trade deadline:

• March 11, 2003: Anaheim traded D Mike Commodore and G Jean-Francois Damphousse to Calgary for C Rob Niedermayer.
• March 11, 2003: Chicago traded D Phil Housley to Toronto for Calgary's fourth-round pick in the 2003 Entry Draft (if acquired) or Toronto's ninth-round pick in 2003 and fourth-round pick in 2004.
• March 11, 2003 – Chicago Blackhawks trade Steve Thomas to Mighty Ducks of Anaheim for 2003 fifth round draft pick (Alexei Ivanov).
• March 11, 2003: Edmonton traded RW Anson Carter and D Ales Pisa to NY Rangers for RW Radek Dvorak and D Cory Cross.
• March 11, 2003: Edmonton traded D Janne Niinimaa and a conditional second-round pick in the 2003 Entry Draft to NY Islanders for LW Brad Isbister and LW Raffi Torres.
• March 11, 2003: Florida traded RW Valeri Bure and a conditional pick in the 2004 Entry Draft to St. Louis for D Mike Van Ryn.
• March 11, 2003: Los Angeles traded D Mathieu Schneider to Detroit for C Sean Avery, D Maxim Kuznetsov, Detroit's first-round pick in the 2003 Entry Draft and second-round pick in 2004.
• March 11, 2003: Los Angeles traded C Bryan Smolinski to Ottawa for the rights to D Tim Gleason and future considerations.
• March 11, 2003: Montreal traded C Doug Gilmour to Toronto for Toronto's sixth-round pick in the 2003 Entry Draft.
• March 11, 2003: NY Islanders traded G Chris Osgood and the Islanders' third-round pick in the 2003 Entry Draft to St. Louis for C Justin Papineau and St. Louis' second-round pick in the 2003 Entry Draft.

• List of Stanley Cup champions
• 2003 Stanley Cup playoffs
• 2002 NHL Entry Draft
• 2002–03 NHL transactions
• 53rd National Hockey League All-Star Game
• NHL All-Star Game
• NHL All-Rookie Team
• 2002 in sports
• 2003 in sports