Sean Bergenheim (born February 8, 1984) is a Finnish professional ice hockey winger, currently playing for the Tampa Bay Lightning of the National Hockey League (NHL).
Bergenheim played in Jokerit of the SM-liiga for three seasons, from 2001 to 2004, winning the Finnish championship in 2002. He was drafted by the New York Islanders as their first pick in the 2002 NHL Entry Draft, 22nd overall.
He signed a three-year deal with the New York Islanders in 2003, and played 18 games for the Islanders in his debut season, 2003–04. Bergenheim scored his first NHL goal - a short-handed goal - against the Pittsburgh Penguins. He was transferred back to Jokerit in January 2004, and moved back to the Bridgeport Sound Tigers in April for the American Hockey League (AHL) playoffs and the subsequent lockout season.