Juozas Vinča (27 November 1905, in Šiauliai – 29 August 1990, in Boston, MA) was a Lithuanian boxer who competed at the 1928 Summer Olympics, representing Lithuania. Vinča started his sport career in 1925 with weightlifting, but Steponas Darius persuaded him to switch to boxing. By 1926, Vinča had become Lithuanian champion. In 1927 and 1928, he became the Baltic champion when he defeated boxers from Latvia, Estonia, and East Prussia.