John A. M. Guernsey (born 1953) is a retired American bishop in the Anglican Church in North America (ACNA).

Previously an Episcopal priest, he was consecrated as a bishop of the Church of Uganda in September 2007 as part of the Anglican realignment, and transferred to the newly formed ACNA in 2009.

[1] Guernsey was nominated, along with Martyn Minns and Robert Duncan, to serve as Bishop of Colorado in 1990.

[3] In December 2006, the bishops of the Church of Uganda elected Guernsey to serve the 33 Ugandan-affiliated Anglican parishes in the United States.

He was notified of the election in June 2007 and consecrated in Mbarara on September 2, 2007, by Ugandan Archbishop Henry Luke Orombi.

[1] They have two adult children, one of whom, Michael, is an Anglican priest and dean of Holy Cross Cathedral in Loganville, Georgia.