Guillermo Roan (born La Plata, 18 June 1988) is an Argentine rugby union player. His usual position is as a Prop and he currently plays for La Plata in Torneo de la URBA.^[1]

For 2015-2016 and 2016–17 Pro12 seasons he played for Zebre.^[2]

After playing for Argentina Under 20, until 2008, Roan was named in the Argentina XV squad for and 2010 IRB Nations Cup and in 2013 in the Argentina squad for summer international tests.^{[citation needed]}