San Benedetto del Tronto is a city and comune in the province of Ascoli Piceno, Marche, Italy. Its population is 50,000 making it the second most populous city in the province. It lies on the coast of the Adriatic Sea and is an active fishing port and one of the main seaside resorts on the central Adriatic coast. Located at the mouth of the river Albula, its territory extends to the river Tronto in the south.