Hermenegildo Cruz was a Filipino writer and trade union organizer.
He was a founding member of Unión Obrera Democrática Filipina and a member of the Philippine Assembly.
He became Director of the Bureau of Labor in 1924.A notable work of his is Kun Sino ang Kumathâ ng~ "Florante" [sic] (English: "On Who Authored 'Florante'"), published in 1906, which is cited as "the first attempt to explain Balagtas by dealing with the poet's biography and the historical context of the poem".