Mark Langdon Hill (June 30, 1772 – November 26, 1842) was United States Representative from Massachusetts and from Maine. He was born in Biddeford (then a part of the Province of Massachusetts Bay) on June 30, 1772. He attended the public schools, then became a merchant and shipbuilder in Phippsburg. He was an overseer and trustee of Bowdoin College. He is the nephew of John Langdon. New Hampshire governor, Senator and patriot.