Samuel Azariah Shelton (September 3, 1858 – September 13, 1948) was a United States Representative from Missouri's 16th congressional district.

Samuel A. Shelton
Member of the U.S. House of Representatives from Missouri's 16th district
In office March 4, 1921 – March 3, 1923
Preceded by	Thomas L. Rubey
Succeeded by	Thomas L. Rubey
Personal details
Born	(1858-09-03)September 3, 1858 near Waterloo, Alabama, U.S.
Died	September 13, 1948(1948-09-13) (aged 90) Marshfield, Missouri, U.S.
Political party	Republican

Born near Waterloo, Alabama, Shelton moved with his widowed mother to Webster County, Missouri in 1869.

Shelton was elected as a Republican to the 67th Congress (March 4, 1921 – March 3, 1923). He was not a candidate for renomination in 1922 to the 68th Congress.