| Richard Ristine | |
| Birth Name: | Richard Osborne Ristine |
| Birth Date: | January 19, 1920 |
| Death Date: | June 20, 2009 (aged 89) |
| Birth Place: | Crawfordsville, Indiana, U.S. |
| Death Place: | Leland, Michigan, U.S. |
| Office: | 41st Lieutenant Governor of Indiana |
| Governor: | Matthew E. Welsh |
| Term Start: | January 9, 1961 |
| Term End: | January 11, 1965 |
| Predecessor: | Crawford F. Parker |
| Successor: | Robert L. Rock |
| Office1: | Member of the Indiana Senate |
| Term Start1: | 1950 |
| Term End1: | 1960 |
| Party: | Republican |
| Education: | Wabash College (BA) Columbia University (JD) |
| Battles: | World War II |
| Unit: | United States Army Air Corps |
Richard Osborne Ristine (January 19, 1920 – June 20, 2009) was an American politician and attorney who served as the lieutenant governor of Indiana from 1961 and 1965.
Richard Ristine was born in Crawfordsville, Indiana. He graduated from Wabash College in 1941 and earned a Juris Doctor from Columbia Law School.
During World War II, Ristine served in the United States Army Air Corps in the Philippines and Japan, where he reached the rank of captain. After his admission to the Indiana State Bar Association, he began working as an attorney. Ristine joined the Republican Party and in 1950 he was elected to the Indiana Senate. Ten years later, he ran successfully for the office of the lieutenant governor of Indiana. He served in this position between January 9, 1961, and January 11, 1965. During his tenure, Ristine voted for Indiana's first sales tax in 1963. He was the Republican nominee in the 1964 Indiana gubernatorial election.
After the end of his political career, Ristine continued his work as a lawyer. He also became a member of the boards of various companies. He also worked as chairman of the Indiana Historical Society.
In 1990, he retired and moved to Leland, Michigan, where he died on June 20, 2009.