Kahmari Montgomery (born August 16, 1997) is an American track and field sprinter specializing in the 400 m for Nike. He was the men's 400 m champion at the USA Championships in 2018, and at the NCAA Division I Championships in 2019. He represented the United States in the relay at the World U20 Championships in 2016 and at the inaugural Athletics World Cup in 2018, earning gold medals in both competitions.