​GRAGNANO, a town of Italy, in the province of Naples and circle of Castellamare, about 2 1 miles E. of Castellamare. It is the seat of a bishop and has a collegiate church, manufactures cloth and maccaroni, and exports an excellent red wine which is well known at Naples. In earlier times it was surrounded with walls and defended by a castle. Population (1871) of town 7321, of commune 12,278.