Ralph Wilbur Moss (April 21, 1862 - April 26, 1919) was a U.S. Representative from Indiana.
He was born on April 21, 1862 in Center Point, Indiana. He was educated in the common schools of the township and attended Purdue University in West Lafayette, Indiana, for two years. He taught school in Sugar Ridge Township. Principal of the graded schools in Harmony, Indiana. He subsequently became engaged in agricultural pursuits. He served as member of the State senate 1905-1909.
Moss was elected as a Democrat to the Sixty-first and to the three succeeding Congresses (March 4, 1909-March 3, 1917). He served as chairman of the Committee on Expenditures in the Department of Agriculture (Sixty-second Congress). He was an unsuccessful candidate for reelection in 1916 to the Sixty-fifth Congress and for election in 1918 to the Sixty-sixth Congress. He retired to his farm near Ashboro, Indiana, where he died on April 26, 1919. He was interred in Moss Cemetery, near his home.