Province of Frosinone

The Province of Frosinone is a province in the Lazio region of Italy, with 91 comuni. Its capital is the city of Frosinone. It has an area of 3,247 square kilometres and a total population of 493,605.

The province was established by royal decree on 6 December 1926 with territories belonging to the then provinces of Rome and Caserta. The areas of the then province of Caserta were the left valley of the Liri-Garigliano river, the district of Sora, the Comino Valley, the district of Cassino, the Gulf of Formia and Gaeta, the Pontine islands, which until then had been for centuries included in the Province called Terra di Lavoro, of the Kingdom of Naples. Most of these territories were part of the ancient Latium adiectum.