Walter Plumer (c. 1682–1746), of Cavendish Square and Chediston Hall, Suffolk, was a British Whig politician who sat in the House of Commons between 1719 and 1741.
[3] Plumer was elected with government support as Member of Parliament for Aldeburgh on 3 December 1719, after spending money liberally against the opposing interest of Lord Strafford.
Sackville Tufton, 7th Earl of Thanet brought him in as MP for Appleby at a by-election on 24 January 1730.
He became one of the leading spokesmen of the opposition Whigs, and was actively engaged in securing the repeal of the salt duty in 1730 and in opposing its re-imposition in 1732.
He supported the nonconformists and moved for the repeal of the Test Act in 1736 and made his last recorded speech on the subject in 1739.