Isaac Smith Hatfield (1826 – October 20, 1872) was a merchant and political figure in Nova Scotia.
He represented Argyle township in the Nova Scotia House of Assembly from 1863 to 1867 as a Liberal-Conservative.
He was born at Tusket Lakes, Yarmouth County, Nova Scotia, the son of Captain James Hatfield and Elizabeth Lent, the daughter of James Lent.
He lived at Tusket, Nova Scotia, where he operated a general store.
This article about a Progressive Conservative party Member of the Nova Scotia House of Assembly is a stub.