Johnathan James Aitken (born May 24, 1978) is a Canadian retired ice hockey defenceman. Aitken was drafted 8th overall in the 1996 NHL Entry Draft by the Boston Bruins and played three games for them. For the 2000–01 season joined HC Sparta Praha in the Czech Republic. 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. Afterwards he headed to the Austrian Hockey League for Klagenfurt AC for the 2006–07 season before retiring from hockey.