Alejo Alvarez (c. 1890s – c. 1940s) was a Filipino track and field athlete who competed in the shot put and discus throw events.

Alongside Regino Ylanan, he was the most successful throws athlete at the Far Eastern Championship Games.

[1] He returned at the following edition in Manila in 1919 and completed a throws double for the host nation.

This made him one of Asia's foremost throws athletes at the start of the 20th century.

[1] He was killed in the Philippines during World War II, defending against the Japanese invasion.