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.

Year	Competition	Venue	Position	Event	Notes
Representing  Peru
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
			1st	2000 m steeplechase	6:08.99 A
1986	South American Junior Championships	Quito, Ecuador	5th	5000 m	16:48.31
			1st	3000 m s'chase	6:12.0
1989	Bolivarian Games	Maracaibo, Venezuela	1st	5000 m	14:18.11
			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

• sports-reference

• José Castillo at World Athletics