| 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 | ||||||
|---|---|---|---|---|---|---|
| 1984 | South American Youth Championships | Tarija, Bolivia | 3rd | 1500 m | 4:20.0 | |
| 3rd | 3000 m | 9:19.9 | ||||
| 1985 | Bolivarian Games | Cuenca, Ecuador | 3rd | 5000 m | 16:15.2 A | |
| bgcolor=gold | 1st | 2000 m steeplechase | 6:08.99 A | |||
| 1986 | South American Junior Championships | Quito, Ecuador | 5th | 5000 m | 16:48.31 | |
| bgcolor=gold | 1st | 3000 m s'chase | 6:12.0 | |||
| 1989 | Bolivarian Games | Maracaibo, Venezuela | bgcolor=gold | 1st | 5000 m | 14:18.11 |
| bgcolor=gold | 1st | 3000 m steeplechase | 8:56.98 | |||
| South American Championships | Medellín, Colombia | 4th | 5000 m | 14:11.94 | ||
| 4th | 3000 m s'chase | 9:00.2 | ||||
| 1990 | Ibero-American Championships | Manaus, Brazil | 4th | 5000 m | 14:03.54 | |
| 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 | ||||