The Potash Corporation of Saskatchewan Inc. (TSX: POT, NYSE: POT), also referred to as PotashCorp, is a Canadian corporation based in Saskatoon, Saskatchewan. The company is the world's largest potash producer and the third largest producers of nitrogen and phosphate, three primary crop nutrients used to produce fertilizer. At the end of 2010, the company controlled 20% of the world's potash production capacity, 2% of nitrogen production capacity and 5% of phosphate supply. The company is part-owner of Canpotex, which manages all potash exporting from Saskatchewan.

It is by far the world's largest producer of potash, producing 20% of the world's supply. It is also the world's largest fertilizer producer, the third largest phosphate producer and the third largest nitrogen producer.

The company was created by the government of Saskatchewan in 1975. In 1989 it became a publicly traded company as the government of Saskatchewan sold off some of its shares, selling the remaining shares in 1990.