Hugh Duncan Baillie (31 May 1777 – 21 June 1866) was a British Army officer and politician who served as the Lord Lieutenant of Ross-shire from 1843 to 1866.
He was the second son of Evan Baillie of Dochfour, a prosperous Scottish merchant based in Bristol, and his wife Mary, daughter of Peter Gurley of St Vincent.
He bought the Ross-shire estate of Redcastle from the Trustees of Sir William Fettes after the latter's death in 1836.
He is buried in a family vault on the inner ring of the Lebanon Circle at Highgate Cemetery (West).
His son Duncan Baillie was also a British Army officer and rose to the rank of lieutenant-general.