Robert Young Thomas (born July 13, 1855) was a Democratic member of the United States House of Representatives from Kentucky. Representing Kentucky’s 3rd congressional district, he served as a U.S. Representative from March 15, 1909, to March 4, 1927. Over the course of his tenure, he completed nine terms in Congress, reflecting a sustained period of electoral support and legislative service.

During his time in office, Thomas served as a historical member of Congress identified under bioguide ID T000185. His congressional career was centered entirely on his role as a Representative from Kentucky, and he is recorded as having left office as a former member after his service ended in 1927. Further details about his committee assignments, office room, or public contact information are not provided in the available records.