James Thomas Hammill Regan (June 29, 1855[1] – 1927[2]) was a farmer, merchant and political figure in Ontario.
He represented Wentworth South in the Legislative Assembly of Ontario from 1911 to 1919 as a Conservative member.
He was born in Chatham, the son of James Regan and Sarah Hammill, and was educated in Ancaster and Dundas.
Regan was married twice: first to Alferetta Templer in 1884 and then to Kate Alma Gabel in 1898.
[1] Regan later served as sheriff for Wentworth County.