Jassen Cullimore (born December 4, 1972 in Simcoe, Ontario) is a Canadian professional ice hockey defenceman currently playing for the Florida Panthers of the National Hockey League.

He was drafted with the 29th pick of the 2nd round of the 1991 NHL Entry Draft by the Vancouver Canucks. In 1996, he was traded to the Montreal Canadiens for Donald Brashear. He was later claimed on waivers by the Tampa Bay Lightning in 1998, where he played until 2004 when he signed a free agent deal with the Chicago Blackhawks after winning the Stanley Cup with Tampa. He remained in Chicago until June 2007 where he was traded back to Montreal in exchange for Sergei Samsonov and Tony Salmelainen. He was released by Montreal soon after. After failing to make the Detroit Red Wings roster during a pre-season tryout in 2007, he signed a free agent deal with Florida. Cullimore is currently an unrestricted free agent after the Florida Panthers decided not to resign him. He resigned a one year deal at the start of the 2008-2009 season with the Florida Panthers earning him 830,000$ and will be UFA on July 1st 2009.