Mary Adelia Rosamond McLeod (September 27, 1938 – October 12, 2022) was the first woman diocesan bishop in the Episcopal Church.

She was elected bishop of the Diocese of Vermont on June 5, 1993, at a special convention held at the Cathedral Church of St. Paul in Burlington.

Following high school, she attended the University of Alabama where she majored in history and was a member of the Kappa Delta sorority.

Accomplishments during her episcopacy include: On her retirement, one Vermont Episcopalian described McLeod as "Firm, Friendly, Focused, Fiscal, Funny, and of course Feminine".

McLeod was a long-time supporter of full inclusion and rights of lesbian, gay, bisexual, and transgender (LGBT) people both in the church and in society.

When the Vermont General Assembly debated proposed legislation to extend marriage benefits to gay and lesbian couples, she testified before the House Judiciary Committee urging approval of the bill.

[7] In February 2000, McLeod enunciated her views on LGBT rights in a pastoral letter to the Diocese of Vermont titled "Let the Church Be the First to Issue an Emancipation Proclamation".