Luiggy Llanos Cruz (born August 22, 1978 in Río Piedras, Puerto Rico) is a male decathlete from Puerto Rico.

He set his personal best (7704 points) at the 2003 Pan American Games in Santo Domingo, Dominican Republic, where he claimed the silver medal.

Year	Competition	Venue	Position	Event	Notes
Representing  Puerto Rico
1994	Central American and Caribbean Junior Championships (U-17)	Port of Spain, Trinidad and Tobago	3rd	400 m	49.5
2001	Hypo-Meeting	Götzis, Austria	14th	Decathlon	7613 pts
	Central American and Caribbean Championships	Guatemala City, Guatemala	2nd	Decathlon	7272 pts A
	Summer Universiade	Beijing, PR China	11th	Decathlon	7377 pts
2002	Central American and Caribbean Games	San Salvador, El Salvador	8th	Javelin	61.32 m
2003	Pan American Games	Santo Domingo, Dominican Republic	2nd	Decathlon	7704 pts NR
2004	Olympic Games	Athens, Greece	—	Decathlon	DNF

• Luiggy Llanos at World Athletics
• sports-reference