National Iranian Oil Company (NIOC) is responsible for planning and managing the production, exploitation, extraction, refining, playback and export of the oil and gas resources of Iran and of the largest oil companies in the world and is in the city of Tehran, the capital. The company in the year 1327 solar after the nationalization of the Iranian oil establishment, and replace the companies.

The National Iranian oil company, now wholly state-owned and is managing director of it proposed by the minister of oil, selection of board members and, ultimately, the judgment of the minister be appointed, and in the hierarchy of office, the deputy of the oil ministry, Iran. The company is in the midst of state-owned enterprises., the third largest producer of oil after Saudi Aramco (Saudi Arabia), Gazprom (Russia) in 2007, is introduced.

company National Iranian South oilfields with production of 85% of the crude oil it Co., Ltd. is the largest producer of oil, National Iranian oil company is accounted and after that, say on the order of Iranian offshore oil company and Iranian Central oil fields Co., the largest subset of the National Iranian oil company are considered.

the brand of the company, the National Iranian oil in the year 1392, in the tenth festival of national heroes of Iran industry as one of the 100 top brands of Iran became known.