Alex Tanguay (born November 21, 1979) is a professional ice hockey player, currently playing for the Tampa Bay Lightning of the NHL. Tanguay was acquired by the Lightning as a free agent in a 2.5 million dollar deal on August 29, 2009. He previously played for the Montreal Canadiens, the Calgary Flames, and the Colorado Avalanche. He has won a Stanley Cup in 2001 as a member of the Avalanche, with whom he was originally drafted 12th overall in the 1998 NHL Entry Draft.

Tanguay, who alternates between left wing and centre, was drafted 12th overall in the first round of the 1998 NHL Entry Draft by the Colorado Avalanche (formerly the Quebec Nordiques, his favorite team growing up). Tanguay started playing for the Avalanche in 1999–00 after three seasons of major junior with the Halifax Mooseheads of the Quebec Major Junior Hockey League (QMJHL). He scored his first NHL goal on October 8, 2000 against the Pittsburgh Penguins and finished with 51 points in his rookie season.

After improving to 77 points in his second campaign, he added 21 points in the post-season to help the Avalanche to the 2001 Stanley Cup championship. In the Finals against the New Jersey Devils, Tanguay scored a goal in game six to help tie the series 3–3 with a 4–0 victory. In the resulting game seven, Tanguay scored the opening two goals and assisted the third in Colorado's 3–1 victory. His second goal end up as the determining Stanley Cup-winning goal.