Gregorio Arbizú (1823–1872)[2] was a Salvadoran politician who was Vice President of El Salvador during the presidency of Francisco Dueñas.
[3] He was then elected Vice President of El Salvador under Dueñas from 1865 to 1869.
After his vice presidential term, he retook the position of minister of foreign affairs in the cabinet of Dueñas.
In 1871, Arbizú joined the revolution against Dueñas.
Later he served again as minister of foreign affairs in the government of Santiago González Portillo.