The raven banner (Old Norse: hrafnsmerki; Middle English: hravenlandeye) was a flag, possibly totemic in nature, flown by various Viking chieftains and other Scandinavian rulers during the 9th, 10th and 11th centuries. The flag, as depicted in Norse artwork, was roughly triangular, with a rounded outside edge on which there hung a series of tabs or tassels. It bore a resemblance to ornately carved "weather-vanes" used aboard Viking longships.

Scholars conjecture that the raven flag was a symbol of Odin, who was often depicted accompanied by two ravens named Hugin nd Muninn.