Robert Dunkerson Orr (November 17, 1917 – March 10, 2004) was an American politician and diplomat who served as the 45th governor of Indiana from 1981 to 1989.

A member of the Republican Party, he served as United States Ambassador to Singapore from 1989 to 1992 under President George H. W. Bush.

[4][6] After returning home, Orr entered into the family business and became active in Republican politics of Vanderburgh County.

As a result of the award, he was invited to serve as a trustee of Hanover College, a position he held for decades.

In 1965 he was elected chairman of the Vanderburg County Republican Central Committee; he held that position for six years.

In 1972, he was nominated at the State Republican Convention to run for Lieutenant Governor on a ticket with Otis R. Bowen.

As lieutenant governor, Orr oversaw the state agricultural bureau and was director of the Indiana Department of Commerce.

[9] In 1986, Orr served as president of the Council of State Governments and as the chairman of the Midwestern Governors Association.

After he left his ambassadorship, Orr established a consulting firm called the Alliance for Global Commerce, which focused on international trade and export issues.

On March 10, 2004, Orr died at the age of eighty-six at the Indiana University Medical Center in Indianapolis from complications following kidney surgery.