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.

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.

Ten years later, he ran successfully for the office of the lieutenant governor of Indiana.