Sir Henry John Caldwell (October 22, 1801 – October 13, 1858) was a seigneur and political figure in Lower Canada and Canada East (now Quebec.)
He represented Dorchester in the Legislative Assembly of Lower Canada from 1830 to 1834.
Caldwell inherited the seigneury of Lauzon after the death of his grandfather.
Caldwell married Sophia Louisa Paynter, the niece of Matthew Whitworth-Aylmer.
[2] He later operated a sawmill in the seigneury of Île-Verte with William Price and Louis Bertrand.