Provinces are governed from a local center, mostly the largest local city. Provincial authority is headed by a governor (استاندار: ostāndār), who is installed by the Minister of Interior subject to approval of the cabinet.
Until 2004 there were 28 provinces. A law passed that year split the province of Khorasan into three new provinces: North Khorasan, Razavi Khorasan, and South Khorasan.
Mazandaran is a province in northern Iran, bordering the Caspian (Mazandaran) Sea in the north.
Counties of the province are: Amol, Babol, Babolsar, Behshahr, Tonekabon, Chaloos, Ramsar, Savad Kooh, Qaem Shahr, Mahmood Abad, Neka, Noor and Noshahr.
The Caspian Sea is to the north, the provinces of Tehran and Semnan lie to the south.