Luíz Antônio dos Santos (6 September 1964 – 6 November 2021)[1][2] was a Brazilian long-distance runner who specialized in the marathon.

Born in Volta Redonda, Rio de Janeiro, he was a World Championships bronze medalist and a 1996 Olympian.

This made him the third Brazilian man to win that race, following on from victories by Joseildo Rocha and José Cesar de Souza in the two years previous.

He performed less well on his next outing in 1994, failing to finish in Gyeongju, but set a personal best at the Boston Marathon with a time of 2:10:39 hours for thirteenth place.

He was third at the 1995 Boston Marathon, recording a time of 2:11:02 hours, then took the bronze medal at the 1995 World Championships – his international debut at that distance.