Andrés Bayron Silva Lemos (born 27 March 1986 in Tacuarembó) is a Uruguayan track athlete. He competed in the combined events on the youth and junior levels, but has since specialized in the 400 metres and 400 metres hurdles. Silva participated in the 400 metres at the 2004 and 2008 Olympics, and 400 metres hurdles at the 2012 and 2016 Summer Olympics. He was Uruguay's flagbearer at the 2007 Pan American Games.