Dennis Jensen (born 11 September 1969) is a retired Danish long-distance runner who specializes in 5000 and 10,000 metres races. He represented Sparta.
Jensen won a number of medals at the Nordic Cross Country Championships: winning the competition in 2000 and taking the bronze in 1997, 1998 and 2001. He finished eleventh in the 10,000 metres at the 2002 European Championships. Jensen is a seven-time national champion (1997-2003) in the men's 5,000 metres.