The Waterloo Memorial Arena was an arena located in Waterloo, Ontario, Canada. It was built in 1947 and primarily used by the Waterloo Siskins junior B hockey team, although it was also once briefly home to the Waterloo Hurricanes major junior team in the Ontario Hockey League.
The arena's roof was deemed structurally unsafe in 1987 and much of the building was demolished, although the grandstands, ice surface, and front facade and dressing rooms remained. The ice was then enclosed in an inflatable vinyl bubble. The arena was made redundant by the 1993 opening of the Waterloo Recreation Complex, although it stayed open until 2001, when it was finally torn down. Perimeter Institute for Theoretical Physics currently occupies the site.