Robert Arthur Miller (born August 28, 1939) is a former chief justice of the South Dakota Supreme Court.
He was a member of the state's judiciary for 31 years and in 1990, he became Chief Justice of the South Dakota Supreme Court.
In 1998, he was appointed to the State Justice Institute (SJI) Board of Directors, which he chaired until 2010.
In 1990, his colleagues on the court voted him chief justice, and he remained in that office for the duration of his service.
[2] In July 2001, Miller announced his retirement from the state supreme court; his last official duty as a judge was overseeing an adoption by a former law clerk.