The 2019 NCAA Division I men's ice hockey tournament was the national championship tournament for men's college ice hockey in the United States. The tournament involved 16 teams in single-elimination play to determine the national champion at the Division I level of the National Collegiate Athletic Association (NCAA), the highest level of competition in college hockey. The tournament's Frozen Four – the semifinals and finals – were hosted by the MAAC at the KeyBank Center in Buffalo, New York from April 11–13, 2019. This was the second Frozen Four in the city of Buffalo, as it previously hosted in 2003.

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.