Loreto Garza (born May 23, 1962 in Sacramento, California) is an American former professional boxer and world champion at light welterweight.

In 1988, Garza won the WBC Americas light welterweight championship with a spectacular first-round knockout of former world champion Harry Arroyo.

In 1989, Garza, with a single right hand in the 7th round, knocked out former world champion Joe Manley.

A couple of months later on August 12, 1989, Garza won a unanimous decision in a 12-round war to win the USBA championship over #1 ranked contender Frankie Warren; Garza fought the last five rounds with his left eye swelled shut.

[citation needed] On August 17, 1990, with only two weeks notice, Garza flew to Nice, France, and won the WBA light welterweight world title by majority decision over the reigning three-time world champion Juan Coggi.