St. Joe Minerals Corporation was the United States largest producer of lead and zinc when it merged with Fluor Corporation in 1981.St. Joe was founded at the St. Joseph Lead Company on March 25, 1864 by Lyman W. Gilbert, John E. Wylie, Edmund I. Wade, Wilmot Williams, James L. Dunham and James L. Hathaway in New York.

St. Joe Minerals Corporation was a mining and manufacturing company based in St. Louis, Missouri. Founded in 1941, it was the largest producer of lead and zinc in the United States and the largest producer of gold in the world. The company was acquired by IMC Global in 1998 and is now part of the Potash Corporation of Saskatchewan.

St. Joe Minerals was founded by brothers Joseph and John E. Connelly. Joseph had previously founded the St. Joe Lead Company in 1853, and the two brothers merged their two companies into St. Joe Minerals in 1941. The company was initially focused on lead and zinc mining operations, but later expanded into other minerals such as gold, silver, copper, and iron.

St. Joe Minerals operated primarily in the Midwest and Southwest United States, with mines located in Missouri, Arkansas, Oklahoma, and Texas. The company also had significant international operations, with mines in Canada, Mexico, and Peru. In addition to mining operations, St. Joe Minerals also operated several manufacturing plants, including a lead smelter in St. Louis, Missouri, and a zinc smelter in Fort Smith, Arkansas.

St. Joe Minerals was a major employer in the St. Louis area, employing over 6,000 people at its peak. The company was also a major contributor to the local economy, providing jobs and tax revenues to the city. St. Joe Minerals was acquired by IMC Global in 1998 and is now part of the Potash Corporation of Saskatchewan. Although the company is no longer in operation, its legacy lives on through the many jobs and economic opportunities it provided to the people of St. Louis.