Johnathan James Aitken (born May 24, 1978) is a Canadian former professional ice hockey defenceman who played in the National Hockey League (NHL) with the Boston Bruins and the Chicago Blackhawks.
He played in three games over the course of his two-year entry-level contract.
For the 2000–01 season he went to the Czech Republic to play for HC Sparta Praha of the Czech Extraliga.
He returned to North America after only a year, and made it back to the NHL during the 2003–04 season with the Chicago Blackhawks, playing 41 games, scoring just one assist.
He moved to the Austrian Hockey League for Klagenfurt AC for the 2006–07 season before retiring from professional hockey.