Rafael Armando Viotti (born 15 February 1988, in Buenos Aires, Argentina) is an Argentine former professional footballer who played as a midfielder.
Viotti stood out in Chilean football playing for San Luis de Quillota, Everton, Deportes La Serena, Unión La Calera, Santiago Wanderers, Cobreloa and San Marcos de Arica.
His last club was Mitre in his homeland.