William Cleireach MacLeod (Scottish Gaelic: Uilleam Cléireach MacLeòid; 1365 – c. 1402) is considered to be 5th Chief of Clan MacLeod. He was a younger son of chief Iain Ciar and was originally intended to enter the church, as his nickname shows; however, on the death of his elder brother, William Cleireach became the heir to the chiefship. As chief of the clan, he led his followers in attacks against the Frasers and defended his lands against the MacDonalds. He did not live a long life and was said to have been buried on the isle of Iona with his predecessors.