 He was postmaster of Hastings, 1907-1914; master of the Michigan State Grange, 1912-1920; and lecturer of the National Grange, 1917-1921.Ketcham was elected as a Republican from Michigan's 4th congressional district to the 67th United States Congress and to the five succeeding Congresses, serving from March 4, 1921, to March 3, 1933.He was an unsuccessful candidate for reelection in 1932, losing in the general election to Democrat George E. Foulkes.