Peggy Fletcher Stack is an American journalist, editor, and author. Stack has been the lead religion writer for The Salt Lake Tribune since 1991.
Peggy Fletcher was born in New Jersey as a member of The Church of Jesus Christ of Latter-day Saints (LDS Church). She is a great-granddaughter of Heber J. Grant, an LDS Church president, a granddaughter of United States Senator from Utah, Wallace F. Bennett, and American physicist Harvey Fletcher.
Fletcher attended the Graduate Theological Union in Berkeley, California. In the late 1970s, she was one of the founders of Sunstone, an independent magazine of Mormon studies. From 1978 to 1986, she was the editor of Sunstone.
In 1991, after she had adopted her marital surname, she became the religion writer for The Salt Lake Tribune in Salt Lake City, Utah, where much of her reporting has focused on the LDS Church.
Stack has also been an advisor on religion to the Public Broadcasting Service. She wrote a children's book about religion, with artist Kathleen B. Petersen, entitled A World of Faith, published in 1998 and 2001.