The province of L'Aquila is the largest, most mountainous and least densely populated province of the Abruzzo region of Italy. It comprises about half the landmass of Abruzzo and occupies the western part of the region. It has borders with the provinces of Teramo to the north, Pescara and Chieti to the east, Isernia to the south and Frosinone, Rome and Rieti to the west. Its capital is the city of L'Aquila.

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.