| José Castillo | |
| Hijos: | Sarai Castillo Müller |
| Fullname: | Juan José Castillo Izarra |
| Birth Date: | 13 March 1968 |
| Country: |  |
| Sport: | Men's athletics |
| Olympics: | 1992 Summer Olympics |
| Show-Medals: | yes |
Juan José Castillo Izarra (born March 13, 1968) is a retired male long-distance runner from Peru.
He is a one-time winner of the Buenos Aires Marathon (1997) in a time of 2:18:35 hours. He represented his native South American country in the men's 10,000 metres at the 1992 Summer Olympics in Barcelona, Spain.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1985 | Bolivarian Games | Cuenca, Ecuador | 3rd | 5000 m | 16:15.2 A | |
| bgcolor=gold | 1st | 2000 m steeplechase | 6:08.99 A | |||
| 1989 | Bolivarian Games | Maracaibo, Venezuela | bgcolor=gold | 1st | 5000 m | 14:18.11 |
| bgcolor=gold | 1st | 3000 m steeplechase | 8:56.98 | |||
| 1990 | South American Games | Lima, Peru | 3rd | 10,000 m | 30:10.4 | |
| 1991 | South American Championships | Manaus, Brazil | 2nd | 10,000 m | 29:37.40 | |
| 1993 | South American Championships | Lima, Peru | 3rd | 5000 m | 13:59.9 | |
| 2nd | 10,000 m | 28:56.80 | ||||