Jens Tillufssøn Bjelke (died in Copenhagen, 14 October 1559) was a Danish-Norwegian nobleman and a feudal lord of Jemtland, Norway, was originally from Danish Skåne (now Swedish).
During the Reformation, Nidarholm Abbey on the island of Munkholmen, was the stronghold of Olav Engelbrektsson, the last Roman Catholic Archbishop of Nidaros.
Bjelke served in the fleet led by Jens Splid which besieged Archbishop Engelbrektsson’s men at Nidarholm in 1537; they were forced to surrender.
He exchanged Munkholmen for Tautra island; from there he served as the feudal overlord of Jemtland, on the Norwegian-Swedish border beginning in 1542 and continuing until his death.
In 1545 Jens Tillufssøn requested and received a royal pardon for himself, his wife and their children, in which King Christian III affirmed there would be no indictment against Lucie for incest.