Charles Smith Keith (January 28, 1873 – October 9, 1945) was a coal and lumber businessman from Kansas City, Missouri.

His father was a colonel of the Confederate States Army in the Civil War and founder of the Central Coal and Coke Company.

[1][2] In 1891, Keith started working at the Central Coal and Coke Company and as a clerk at the auditor's office in Kansas City.

[1] After six months in Missouri, Keith became a traveling sales agent for the Central Coal and Coke Company.

[2] During World War I, Keith was a member of the raw materials division of the Council of National Defense.

Towards the end of his life, Keith was a director of the Kansas City Power & Light Company and the Lumbermen's Underwriting Alliance.

He was chairman of the board of T. H. Mastin & Co.[2] He also served as president of the Interstate Coal Operators Association and worked to find ways to keep deep vein mining profitable.