Lieutenant-Colonel Edward Henry Cooper PC (Ire) (1827 – 26 February 1902) was an Irish officer in the British Army, a landlord in County Sligo, and a Conservative politician.
At the age of 36 the Dublin-born soldier inherited Markree Castle in County Sligo from his uncle, and left the army to manage his country estate. As one of the major landlords in the county, he assumed many of the roles which still accompanied that status. He promptly became a local magistrate, and in 1865 was returned unopposed by the county to the House of Commons of the United Kingdom.
Having followed five previous Cooper landlords of Markree to serve as Member of Parliament (MP) for Sligo, his unpopularity as a landlord led to his defeat in 1868, after one term. He then reactivated his uncle's Markree Observatory, and commissioned archaeological drawings of County Sligo. He served as the Lord Lieutenant of Sligo for the 25 years until his death, and for the last three as a Privy Councillor.