Sir Robert Long, 6th Baronet (1705 – 10 February 1767), was an English politician.
Educated at Balliol College, Oxford, he succeeded his father as 6th Baronet on 16 March 1729, and inherited the family estates, including the manors of Draycot and Athelhampton.
He was elected Member of Parliament for the rotten borough of Wootton Bassett in 1734, and for Wiltshire in 1741.
Sir Robert and Emma had two daughters and four sons including: Many letters written by Sir Robert to his wife are held in the Wiltshire and Swindon Record Office, and furnish a picture of a happy marriage in the eighteenth century, illustrating a genuine affection for his wife, and fatherly love for his children, with nicknames such as 'Jemmy' and 'Dolly'.
He had good-natured relationships with his dependants, even going so far as choosing material for a new dress for Lady Emma's companion.