Shillhope Law is a hill in the southern Cheviots, a range of hills in Northumberland, England. Shillhope Law is a relatively unremarkable member of this group; in common with its neighbours it has a small summit and steep, grassy sides falling to deeply incised valleys on either side. However, unlike its neighbours, the ridge connecting Shillhope Law to the higher dome of The Cheviot to the north is bisected by a low col at 343 m, giving it enough relative height to be a Marilyn.