Walter Long JP (c. 1648 – 16 July 1731), of Bristol and South Wraxhall, Wiltshire, was an English politician who sat in the House of Commons in 1701.
Long's Wiltshire property meant he could put himself forward as a candidate at Calne at the first general election of 1701, when he was returned as member of parliament in a contest.
He was inactive in the House and on 10 May he was granted leave of absence for an unspecified period.
[2] Long's grandfather John Long (c. 1585 – 1636) was disinherited by his father, Sir Walter Long (1565–1610) of South Wraxall and Whaddon, by the contrivances of the latter's second wife Catherine née Thynne (a daughter of the first Sir John Thynne of Longleat) but a compromise later led John to receiving South Wraxall, and his brother the manor of Draycot.
South Wraxall eventually passed to Walter Long, who died unmarried on 16 July 1731.