Charles A. O. McClellan (May 25, 1835 – January 31, 1898) was an American banker, lawyer, and jurist who served four terms as a U.S. Representative from Indiana from 1889 to 1893.

Born in Ashland, Ohio, McClellan moved to Auburn, Indiana, in 1856.

He was appointed judge of the Fortieth Judicial Circuit of Indiana by Governor Williams in 1879, and served for two years.

He served as chairman of the Committee on Expenditures in the Department of the Navy (Fifty-second Congress).

This article incorporates public domain material from the Biographical Directory of the United States Congress