Cristian Onetto (born 11 February 1983) is a Chilean Rugby Union player. He plays as a fly-half or centre.
He made his debut for Chile at the age of 19 in 2002 during the IRB World Cup Qualifiers.
He currently plays for COBS in Chile after previously playing for Stade Domontois (Domont) in France, Adus (Spain) and Old Reds (Chile).