Isaac Adams (c. 1773-5 July 1834) was a politician from Portland, Maine. Adams served in the Massachusetts House of Representatives from 1808 to 1819. After Maine attained statehood in 1820, he served in the Maine House of Representatives; in the first Maine legislative session, he was one of three legislators from Portland and served alongside Asa Clapp and Nicholas Emery.[1] He was elected to single-year terms from 1821 to 1824 and 1826 to 1830. He is buried at Eastern Cemetery in Portland.[2]