The Earldom of Windshare was a Corisandian patent of nobility that made its holder the ruler of an area in the south west of Corisande Island, just north of West Margo Sound.

It was bordered by the Barony of Hardshoal to the east, the Earldom of Shreve to the north, and the Earldom of Rochair to the east.

The holder of the title in the late 9th Century of God was Lord Sir Alyk Ahrthyr. (OAR)