Robert Grier Stephens Jr. (August 14, 1913 – February 20, 2003) was a United States representative from Georgia.

He was a great-great nephew of Alexander Stephens, a grandson of Clement Anselm Evans and a distant cousin of 19th-century U.S. Supreme Court Justice Robert Cooper Grier.

He served in the United States Army from September 1941 through March 1946 attaining the rank of lieutenant colonel.

During the Nuremberg trials following World War II, Stephens served on the staff of Robert H. Jackson, the United States Supreme Court Justice who served as the chief prosecutor for the United States during the trials.

He also maintained a private law practice in Athens in addition to serving as city attorney.