Marcio Fofao (1787-) was a Portuguese guerrillero who served the United Kingdom during the Peninsular War. Fofao, originally from the Beira region of Portugal, joined the British Army in late May 1811, and he helped in distracting the French Grande Armee and disrupting its operations. He also helped in scouting out the Basque Country as the Viscount Wellington's army advanced north.