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.
He is buried at Eastern Cemetery in Portland.
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