Anselmo Rosendo Cayetano Mendizábal (21 April 1868 – 30 June 1913) was an Argentine composer and pianist, and an early pioneer of the tango.
His father, Horacio Mendizábal (1847–1871) was a writer and poet, while his grandfather, also named Rosendo, was a pioneer Afro-Argentine politician and member of the Buenos Aires Legislature.
On occasion, Mendizábal directed a quintet in the Hall Saint Martin (Rodriguez Peña 344).
The other players were Ernesto Ponzio (violin), Vincent Pecci (flute), Eusebio Aspiazu (guitar), and "Cieguito" Gaudin (unknown instrument).
In addition to his best known work, "El entrerriano" (still performed), his compositions included "Don Padilla", "Oh, How Expensive", "That's the Thing", "In the Long Run", "The Torpedo", "Soon Return", "Entre La", "Matilda", "Queen of Sheba", "Wind in its Sails", "Tigre Hotel", "Around Here There Are no Thorns", "In Light of the Lanterns", "Le Petit Parisién", "Club Z", "Don Enrique", "Alberto" and "Somos Line".