Barletta is a city and former comune in Apulia, in southeastern Italy. Barletta is the capoluogo, together with Andria and Trani, of the Proviā¦Barletta is a city and former comune in Apulia, in southeastern Italy. Barletta is the capoluogo, together with Andria and Trani, of the Province of Barletta-Andria-Trani. It has a population of around 94,700 citizens.