The 2011 IIHF World U20 Championship, commonly referred to as the 2011 World Junior Hockey Championships, was the 35th edition of the Ice Hockey World Junior Championship and was hosted by the United States. The games were played in Western New York, at HSBC Arena in Buffalo and Niagara University's Dwyer Arena in Lewiston. Russia won the gold medal with a 5–3 victory over Canada in the championship game, after completing the biggest comeback in the WJHC history; being down 3–0 after two periods, the Russians scored five goals in the third period to capture their first WJHC gold medal since 2003. The host team, the United States, won the bronze medal with a 4–2 win over Sweden.

KeyBank Center is a multipurpose indoor arena located in Buffalo, New York. Originally known as Marine Midland Arena, the venue has since been named HSBC Arena and First Niagara Center. Home to the Buffalo Sabres of the National Hockey League since 1996, is the largest indoor arena in Western New York, seating 19,070. It replaced the Sabres' former home, Buffalo Memorial Auditorium, where the team played from 1970 to 1996. The venue is also home to the Buffalo Bandits of the National Lacrosse League.