Marco Antônio Costa Ferreira de Macedo (born 9 September 1990 in Natal) is a Brazilian competitive swimmer.

[2] He won the bronze medal in the 4×100-metre freestyle at the 2008 FINA Youth World Swimming Championships in Monterrey.

[3] At the 2011 World Aquatics Championships in Shanghai, China, Macedo finished 9th in the 4×100-metre freestyle.

[4] At the 2011 Summer Universiade in Shenzhen, China, he got a silver medal in the 4×100-metre freestyle relay.

[6] Marcos won the gold medal in the 4 × 100 m relay, in the team also composed by César Cielo, Guilherme Guido, and Felipe França Silva.