The province of Chieti is a province in the Abruzzo region of Italy. Its provincial capital is the city Chieti, which has a population of 50,770 inhabitants. The province has a total population of 387,649 inhabitants as of 2017 and spans an area of 2,599.58 square kilometres (1,003.70 sq mi). The province contains 104 comuni. Its provincial president is Mario Pupillo.

Abruzzo, historically known as Abruzzi, is a region of Southern Italy with an area of 10,763 square km and a population of 1.3 million. It is divided into four provinces: L'Aquila, Teramo, Pescara, and Chieti. Its western border lies 80 km (50 mi) east of Rome. Abruzzo borders the region of Marche to the north, Lazio to the west and north-west, Molise to the south and the Adriatic Sea to the east. Geographically, Abruzzo is divided into a mountainous area in the west, which includes the highest massifs of the Apennines, such as the Gran Sasso d'Italia and the Maiella, and a coastal area in the east with beaches on the Adriatic Sea.