| Juan Castillo | |
| Fullname: | Juan Mauricio Castillo Balcázar |
| Birth Date: | 29 October 1970 |
| Birth Place: | La Serena, Chile |
| Height: | 1.72 m |
| Position: | Forward |
| Years1: | 1988–1991 |
| Years2: | 1990 |
| Years3: | 1992–1993 |
| Years4: | 1993–1994 |
| Years5: | 1995 |
| Years6: | 1996–1997 |
| Years7: | 1998 |
| Years8: | 1999 |
| Years9: | 2000–2001 |
| Clubs1: | Deportes La Serena |
| Clubs2: | → San Luis (loan) |
| Clubs3: | Unión Española |
| Clubs4: | Colo-Colo |
| Clubs5: | Deportes La Serena |
| Clubs6: | Deportes Temuco |
| Clubs7: | Deportes La Serena |
| Clubs8: | Deportes Iquique |
| Clubs9: | Coquimbo Unido |
| Nationalyears1: | 1992–1997 |
| Nationalteam1: | Chile |
| Nationalcaps1: | 6 |
| Nationalgoals1: | 1 |
| Pcupdate: | 8 June 2009 |
| Ntupdate: | 9 July 2007 |
Juan Mauricio Castillo Balcázar (born 29 October 1970) is a Chilean retired footballer who played as a forward during his career. He obtained six caps (one goal) for the Chile national side, making his debut on 31 March 1993.