Charles Preston Wickham (September 15, 1836 – March 18, 1925) was a 19th-century congressman and judge from Norwalk, Huron County, Ohio. Wickham attended the public schools, the Norwalk Academy, and the Cincinnati Law School. He was admitted to the bar in 1858 and practiced in Norwalk, Ohio. During the American Civil War, he enlisted as a private in Company D, Fifty-fifth Regiment, Ohio Volunteers, in September 1861 and rose to the rank of lieutenant colonel by brevet. He was mustered out of the service July 11, 1865 and resumed the practice of law in Norwalk.