Juan Lazcano (born March 23, 1975) is a Mexican-born American professional boxer currently based in Sacramento, California. He fights at light welterweight and is a former World Boxing Foundation (WBF), NABF and IBA lightweight champion, as well as having challenged for the IBO light welterweight title.

Lazcano was born in Ciudad Juárez and was moved to El Paso when two months old. There, he attended Jefferson High School, later finishing at Bowie High. At Jefferson High, he and classmate Daniel Puente, along with other young boxers, sparred together at Rocky's Gym where he was crowned the Golden Gloves. He now lives and fights out of Sacramento, California.^[1]

He and Lourdes were childhood sweethearts, but are now divorced. They have four children together. They became parents when Juan was only 17 years of age.^{[citation needed]} Lazcano is engaged to Tammy Howard, a teacher in Phoenix, AZ. They have been together since 2018.^{[citation needed]}

Lazcano had an extensive amateur career. He had in excess of 100 amateur fights from the age of 8 to 18 with 135 wins and 15 losses and won the Texas Golden Gloves titles and boxed in the US national championships at both junior and open class levels.^[2]

Lazcano turned professional in July 1993 in Reseda, California on the undercard of a bill that included Shane Mosley and Mauro Gutierrez. On his debut he defeated Chris Crespin with a first round knockout.^[1]