Ninfa Baronio (1874-1969) was an Italian-American anarcha-feminist activist during the late 19th and early 20th centuries. After emigrating from Northern Italy to Paterson, New Jersey, she helped found Paterson's anarchist Gruppo Diritto all'Esistenza (Right to an Existence Group); co-founded a local feminist group and performed in feminist plays; and, with her companion Firmino Gallo, ran an anarchist bookstore said to be "America's richest storehouse of extreme radical literature."