St Sunday Crag is a Lake District fell of 841.2 m in Westmorland and Furness. It counts towards four lists: Wainwrights, Hewitts, Nuttalls and Marilyns.
It stands 217.2 m above its nearest neighbour, Birks, 1.5 km to the north-east. It is one of the 39 Wainwrights that are also Marilyns. It shares its height of 841.2 m with Sgurr an Airgid. On the Wainwrights height ladder it sits between Stybarrow Dodd (843.7 m) and Scoat Fell (841 m).