Kristopher Letang (born April 24, 1987, in Montreal, Quebec) is a Canadian professional ice hockey defenceman currently playing for the Pittsburgh Penguins of the National Hockey League (NHL).

Letang played major junior for the Val-d'Or Foreurs of the QMJHL for three seasons. After recording 32 points in his junior rookie season, he was named to the QMJHL and the CHL All-Rookie Team. That summer, he was drafted in the 3rd round, 62nd overall, in the 2005 NHL Entry Draft by the Pittsburgh Penguins. The next season, a 68-point effort in just 60 games earned him QMJHL First Team All-Star honours.

Making the Penguins out of training camp, Letang made his NHL debut in the 2006–07 season. He scored his first NHL goal in his third game, against Rick DiPietro of the New York Islanders in a 6-5 win. However, after two goals in seven games, Letang was scratched twice and then returned to Val-d'Or for further development. Playing in his third season with Val-d'Or, Letang led the Foreurs to the 2007 QMJHL Finals with 31 points in the post-season, only to be swept by Lewiston in four games. Upon the Foreurs' elimination, he was assigned to the Wilkes-Barre/Scranton Penguins of the American Hockey League (AHL), who was in the second round of the Calder Cup playoffs, and recorded an assist in his only game. At the season's end, he was the recipient of three major QMJHL awards. In addition to receiving the Emile Bouchard Trophy, as the best defenceman, and the Paul Dumont Trophy, as the best personality, Letang also received the Kevin Lowe Trophy, as the best defensive defenceman, indicative of Letang's abilities on both ends of the ice.