Charles Benjamin Clark (August 24, 1844 – September 10, 1891) was a U.S. Representative from Wisconsin and one of the founders of the Kimberly-Clark Corporation in Neenah with John A. Kimberly, Franklyn C. Shattuck, and Havilah Babcock.

[1][2] Born in Theresa, New York, Clark attended the common schools.

An unsuccessful candidate for reelection in 1890, he died of Brights Disease the following September at age 47 at Watertown, New York, while on a visit to his old home.

Clark was interred in Wisconsin at Oak Hill Cemetery in Neenah.

ThedaCare Regional Medical Center-Neenah, opened in 1909 as Theda Clark Memorial Hospital, was named for his eldest child.