Carsoli (Marsicano: Carsòi) is a town and comune in the province of L'Aquila, Abruzzo (central Italy).

The ancient city, known as Carsioli (or Carseoli), was founded in the country of the Aequi between 302 and 298 BC, just after the establishment of Alba Fucens, no doubt as a stronghold to guard the road to the latter.

It is mentioned in 211 BC as one of the 12 of 30 Latin colonies that protested their inability to furnish more men or money for the war against Hannibal.

[3] The line of the city walls (originally in tuff, and reconstructed in limestone), built of rectangular blocks, can still be seen.

[3] Some 2 kilometres (1.2 mi) to the northwest of Carsoli are the remains of an ancient aqueduct consisting of a buttressed wall of concrete crossing a valley.