William Jay Lambert III (born October 2, 1948[1]) is an American bishop of the Episcopal Church.

He was the sixth bishop of the Diocese of Eau Claire based in the state of Wisconsin from March 2013 to December 2020.

In October 2021 he became rector of St. Phillip's Episcopal Church in Jacksonville, Florida.

[2] Lambert received a Bachelor of Arts in history and public affairs from Rollins College, a Masters of Arts in history from the University of Georgia and a Masters of Divinity from Nashotah House.

[3] He was elected bishop of the Diocese of Eau Claire on November 10, 2012.