Alejandro Sanabria Jr. (born 19 February 1987) was a Mexican professional boxer who competed from 2004 to 2013. He is a former WBC Continental Americas super featherweight and WBC Silver lightweight champion.
Sanabria began his professional career in 2004. He mainly campaigned in the super featherweight and lightweight divisions.
A rising prospect, Sanabria claimed the WBC FECARBOX super featherweight title in 2008 and added the NABF super featherweight title the following year. In 2011, he earned a notable victory over Olympic silver medalist Rocky Juarez to capture the vacant WBC Continental Americas super featherweight title, and later that year secured the vacant WBC Silver lightweight title. His final professional appearance came on 15 June 2013, when he challenged future five-division world champion and three-division undisputed champion Terence Crawford for the vacant NABO lightweight title, losing by sixth-round technical knockout.