OCP Group, formerly Office Chérifien des Phosphates, is a Moroccan state-owned phosphate rock miner, phosphoric acid manufacturer and fertilizer producer. Founded in 1920, the company has grown to become the world's largest producer of phosphate and phosphate-based products and it is one of the largest phosphate, fertilizer, chemicals, and mineral industrial companies in the world by revenue.

OCP has access to more than 70% of the world's phosphate rock reserves. Initially a mining company, OCP diversified in 1965 to become a phosphate processor, making it the world's largest fertilizer manufacturer. The company holds a 31% market share of the world phosphate product market.

The Group employs nearly 17,000 people in Morocco, along with staff in several international subsidiaries. In 2024, it generated revenues of US $9.76 billion.

The OCP Group was founded in Morocco in 1920 as the Office Chérifien des Phosphates following Royal Decree. Mining production began in 1921, when it began extracting phosphate rock at its first mine in Khouribga. Transportation of the phosphate to the port of Casablanca also started in 1921, allowing the first export of phosphate that year. Subsequently, OCP launched other mining sites in Youssoufia in 1931 and in Benguerir in 1976, and launched chemical production in Safi in 1965, and in Jorf Lasfar in 1984.

In 2008, the OCP Group became a limited company. Currently 95% of the OCP Group is owned by the Moroccan state and 5% by Banque Centrale Populaire investment funds.

In 2007, the OCP Group set itself a target to triple its production of fertilizers by 2020.

The OCP Group plays an important economic and social role in Morocco. The value of phosphates and their derivatives represented nearly a quarter of the country's exports and approximately 3.5% of the GDP in 2010.

In 2016, Fitch Ratings confirmed the rating of "investment grade" for the OCP Group.