Juan José Madrigal Pacheco (born March 8, 1974) is a Costa Rican former swimmer, who specialized in breaststroke events.

[1] He is a two-time Olympian (1996 and 2000), and a Costa Rican former record holder in the 50-, 100-, and 200-m breaststroke (long course and short course).

Swimming in heat two, he held off Namibia's Jorg Lindemeier by three-hundredths of a second (.03) to pick up a third seed in 1:05.47.

[3][4] In the 100 m breaststroke, held on the first day of the games, Madrigal established a new Costa Rican record of 1:05.14 to lead the second heat, but ended up overall in forty-eighth place.

[5][6] Three days later, in the 200 m breaststroke, Madrigal placed forty-third on the morning prelims, swimming in heat three.