Santiago Dellapè (born 9 May 1978) is an Italian Argentine rugby union footballer.

He plays for Italy, and was included their 2003 Rugby World Cup squad to Australia.

Born in La Plata, Argentina, Dellapè played rugby there until he joined L'Aquila in Italy in 2001.

He soon moved to Benetton Treviso, and was a part of the team that won the 2003–04 Super 10 title.

Dellapè made his debut for Italy during the 2002 Six Nations Championship match against France, and since the 2002 series, has become a regular in the Italian side.