Marcos Aurelio Díaz Domínguez (born January 12, 1975) is a Dominican ultra-distance swimmer of open waters.

In the year 2006, he competed in the turbulent waters of the Bhagirathi River, where he won first place.

Finally, in 2010 he completed a feat in which he swam across all five continents in promotion of the United Nations Millennium Development Goals.

[1] In 2011 Marcos Díaz was inducted in the International Marathon Swimming Hall of Fame, class of 2012.

This biographical article related to a Dominican swimmer is a stub.