Marily dos Santos (born 5 February 1978) is a Brazilian marathon runner.

In professional competition, she was the 2012 winner at the Maratona di Sant'Antonio in Italy.

[5] She has won numerous road running competitions in Brazil, with highlights including the 2007 Rio de Janeiro Marathon, the 2008 Brasilia Half Marathon and two victories at the Corrida de São Sebastião.

She represented Brazil at the 2003 IAAF World Half Marathon Championships.

Her cousin José Santana placed second in the marathon at the 1991 Pan American Games.