Fredy José Bareiro Gamarra (born 27 March 1982, in Itauguá) is a Paraguayan footballer who currently plays for Sportivo Luqueño.
Bareiro is one of very few footballers to have participated in back-to-back finals of the Copa Libertadores, playing for Olimpia Asunción in the 2013 final and for Nacional Asunción in the 2014 final.
Bareiro has represented Paraguay at under-20, under-23, and full international level, participating at the 2001 FIFA World Youth Championship, 2004 CONMEBOL Men Pre-Olympic Tournament, 2004 Copa América and the 2004 Summer Olympics, earning Silver Medals at the latter.