Edmundo Bossio Dioko[a] (22 November 1922[3] – 21 February 1975),[4] was an Equatoguinean farmer[5][6] and politician, first Vice President of Equatorial Guinea after the independence of the country.

After his return to Fernando Poo, he dedicated much of his time to competing with the Spanish landowners in the exploitation of his family's cocoa plantations, to which he joined others on a lease basis.

[8] Between August 1966 and April 1967 he became one of the main representatives of Bubi nationalism, as president of the Agrarian Chamber of Fernando Poo, while performing the function of procurator in the Cortes Españolas, since in the elections held in the Fernando Poo Province [es] on 16 November 1967 he obtained 4,125 votes out of 6,731 cast.

He led the formation of the group Bubi Union [es], which later became a political party, with which he obtained 5,000 votes in the first round of the September 1968 presidential elections.

[12] At the end of 1974, he was investigated by the Information Services (after an official portrait of Macías posted on the door of his home was destroyed)[12] and subjected to house arrest.