Ian Campbell Hannah (16 December 1874 – 7 July 1944) was a British academic, writer and Conservative Party politician.
In 1899 his younger brother, William, became one of the early casualties of the Second Boer War when he was killed by a falling shell the day after the Battle of Talana Hill.
After a spell in England, Hannah returned to America in 1915 to become professor of church history at the Oberlin Theological Seminary.
Hannah published several books, many with illustrations by his wife, including Sussex (1912), Berwick and the Lothians (1913), The Heart of East Anglia, and Capitals of the Northlands (1914), and The Story of Scotland in Stone (1934).
This article about a Conservative Member of the Parliament of the United Kingdom representing an English constituency and born in the 1870s is a stub.