Francesco Nullo (1 March 1826 – 5 May 1863) was an Italian patriot, military officer and merchant, and a close friend and confidant of Giuseppe Garibaldi. He supported independence movements in Italy and Poland. He was a participant in the Five Days of Milan and other events of the revolutions of 1848 in the Italian states, Sicilian Expedition of the Thousand in 1860 and the Polish January Uprising in 1863. His military career ended with him receiving the rank of general in Poland, shortly before his death in the Battle of Krzykawka.