Húnaflói (, lit. 'Polar Bear Cub Bay') is a bay of the Iceland Sea in Northwestern Region and Westfjords, Iceland. It is situated between the village of Strandir on Vestfirðir peninsula to the west and the Skagaströnd of Skagi peninsula to the east. Spanning 188.8 km2, it has a maximum width of about 50 km and length of 100 km. The Battle of the Gulf was a naval battle on 25 June 1244 in Húnaflói, during the Age of the Sturlungs civil war. A detailed description of the battle can be found in Sturlunga saga.

Fauna

The bay has been proposed as a protected area for harbor seals.