Jakob Bernhard Christian Jensen (February 16, 1912 - June 17, 1997) was a Danish flatwater canoeist who competed in the late 1940s. He won a silver in the K-2 1000 m event at the 1948 Summer Olympics in London.
Jensen also won two bronze medals at the 1948 ICF Canoe Sprint World Championships in London, earning them in the K-1 4 x 500 m and the K-2 500 m events.