Robert Young Thomas Jr. (July 13, 1855 – September 3, 1925) was a U.S. Representative from Kentucky.

He was admitted to the bar in 1881 and commenced practice in Central City, Kentucky.

Thomas was elected Commonwealth attorney for the seventh judicial district of Kentucky in 1903 for a term of six years.

Thomas was elected as a Democrat to the Sixty-first and to the eight succeeding Congresses and served from March 4, 1909, until his death at Red Boiling Springs, Tennessee, September 3, 1925.

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