Thaddeus Baker Hurd (October 23, 1903 — March 12, 1989) was an architect and amateur historian who is known for his interest and extensive research in the history of the city of Clyde, Ohio, United States. Hurd had several jobs in the field of architecture until his retirement in 1967. He was the founder of the Clyde Heritage League, a historical society. His work was contributed to several museums and libraries.