Arthur Robin Ian Hill, 8th Marquess of Downshire (10 May 1929 – 18 December 2003), known as Robin Hill, was an Irish peer and the Hereditary Constable of Hillsborough Fort.
He was the only son of Lord Arthur Francis Hill and Ishabel Wilhelmina Sheila MacDougall.
He successfully re-established his Ulster-based landowning family in North Yorkshire following the Irish Land Acts and the creation of Bracknell New Town, which had largely deprived him of his original estates.