The Tennessee Coal, Iron and Railroad Company, also known as TCI and the Tennessee Company, was a major American steel manufacturer with interests in coal and iron ore mining and railroad operations. Originally based entirely within Tennessee, it relocated most of its business to Alabama in the late nineteenth century.

The Tennessee Coal, Iron and Railroad Company (TCI) was a major American industrial enterprise that operated from 1852 to 1952. It was founded in Knoxville, Tennessee and was one of the largest iron and coal companies in the United States. The company was a major producer of iron and steel products, including railroad rails, steam locomotives, and other iron and steel products. The company also operated coal mines and iron ore mines in Alabama, Tennessee, and Georgia.

At its peak, TCI operated several iron and coal mines, as well as iron and steel mills, foundries, and blast furnaces. The company operated many of the most important iron and steel mills in the country, including the Ensley Works in Birmingham, Alabama, and the Etowah Works in Gadsden, Alabama. TCI also operated several coal mines in the Appalachian region, including the Lookout and Coal Creek Mines in Tennessee and the Ward Mine in Georgia.

TCI was a major employer in the region and was responsible for significant economic development in the area. The company was a major provider of jobs and helped to spur economic growth in the region. The company was also a major contributor to the development of the railroad industry in the South. The company operated several railroad lines, including the Tennessee Valley Railroad and the Alabama and Chattanooga Railroad.

TCI was also a major player in the steel industry in the United States. The company was a major producer of steel products and was a major supplier of steel for the construction of bridges, buildings, and other structures. The company also helped to develop new technologies and processes for the production of steel.

TCI was a major contributor to the economy of the South and helped to spur economic growth and development in the region. The company was responsible for significant economic development in the area and helped to create jobs and spur economic growth. The company was also a major contributor to the development of the railroad industry in the South.