John Doyle Lee was an American pioneer, and prominent early member of the Latter Day Saint Movement in Utah. Lee was later convicted of mass murder for his complicity in the 1857 Mountain Meadows Massacre and sentenced to death. In 1877, he was executed by firing squad at the site of the massacre.

The Mountain Meadows Massacre was a series of attacks during the Utah War that resulted in the mass murder of at least 120 members of the Baker–Fancher emigrant wagon train. The massacre occurred in the southern Utah Territory at Mountain Meadows, and was perpetrated by settlers from the Church of Jesus Christ of Latter-day Saints involved with the Utah Territorial Militia who recruited and were aided by some Southern Paiute Native Americans. The wagon train, made up mostly of families from Arkansas, was bound for California, traveling on the Old Spanish Trail that passed through the Territory.