Nicholas Araújo Dias dos Santos (born 14 February 1980) is a Brazilian competitive swimmer who specializes in freestyle and butterfly sprint events. Nicholas swims for Esporte Clube Pinheiros. He swam the 50-metre freestyle at the 2008 Summer Olympics and was a member of the Brazilian 4×100-meter freestyle team at the 2012 Summer Olympics. At the 50-metre butterfly, he is the World Record holder in Short Course, and he was the Americas Record Holder in Long Course.