James Abdnor, American soldier and politician, 30th Lieutenant Governor of South Dakota (b. 1923)
Ellis James Abdnor (February 13, 1923 – May 16, 2012) was an American politician who served as a member of the United States Senate from South Dakota. He was also the 15th Administrator of the Small Business Administration under presidents Ronald Reagan and George H. W. Bush.

Abdnor had previously represented South Dakota's 2nd congressional district in the United States House of Representatives and served as the 30th Lieutenant Governor of South Dakota and a member of the South Dakota Senate.