Lee Boyd Malvo (born February 18, 1985), also known as John Lee Malvo, is a Jamaican convicted mass murderer who, along with John Allen Muhammad, committed a series of murders dubbed the D.C. sniper attacks over a three-week period in October 2002. Malvo was aged 17 during the span of the shootings. He is serving multiple life sentences at Keen Mountain Correctional Center in Virginia, a maximum security (level 4) prison.

The D.C. sniper attacks were the last in a series of shootings across the United States connected to Muhammad and Malvo which began on the West Coast. Muhammad had befriended the juvenile Malvo and enlisted him in the attacks. According to Craig Cooley, one of Malvo's defense attorneys, Malvo believed Muhammad when he told him that the $10 million ransom sought from the U.S. government to stop the sniper killings would be used to establish a Utopian society for 140 homeless Black children on a Canadian compound. In 2012, Malvo claimed that Muhammad had sexually abused him.