Qaem Shahr, also Romanized as Qā’em Shahr; formerly known as Shāhi (شاهی), is a city in the Central District of Qaem Shahr County, Mazandaran province, Iran, serving as capital of both the county and the district. Originally known as Aliyabad, the name Ŝâhi (Shahi) was used until the Iranian Revolution in 1979 when the city acquired its current name.

Mazandaran province is one of the 31 provinces of Iran, located along the southern coast of the Caspian Sea and in the adjacent Central Alborz mountain range, in central-northern part of the country. The province, founded in 1937, covers an area of 23,842 km2.