Nicolás Ignacio Castillo Mora (born 14 February 1993) is a Chilean professional footballer who plays for Universidad Católica as a striker.

[3][4] In 2010, Castillo made a goalscorer debut against San Pedro de Atacama football team for a cup game, sealing a 10–0 thrash of Católica after scoring the tenth and last goal of it.

[7] As a result of his performance in the 2013 FIFA U-20 World Cup, Castillo was linked with Premier League side Manchester United, where his compatriot Ángelo Henríquez was playing at the time.

[8] In January 2014, Universidad Católica reached an agreement to sell Castillo to Belgian Pro League side Club Brugge.

[23] Castillo made his debut for the Chile senior team on 23 March 2013 in a 1–0 2014 FIFA World Cup qualification (CONMEBOL) away loss to Peru, coming on as a 70th-minute substitute for Jean Beausejour.