Arequipa is a province in the Arequipa Region, Peru. Its capital, Arequipa, is Peru's second most populous province of Peru. It borders the provinces of Islay, Camaná, Caylloma, and the Cusco and Puno regions. According to INEI in the year 2014 it has a population of 958.351 people.

Arequipa is a department and region in southwestern Peru. It is the sixth largest department in Peru, after Puno, Cuzco, Madre de Dios, Ucayali, and Loreto, its sixth most populous department, and its eleventh least densely populated department. It is bordered by the departments of Ica, Ayacucho, Apurímac and Cusco in the north, the Department of Puno in the east, the Department of Moquegua in the south, and the Pacific Ocean in the west. Its capital, also called Arequipa, is Peru's second-largest city.