John William Montagu, 7th Earl of Sandwich PC (8 November 1811 – 3 March 1884), styled Viscount Hinchingbrooke from 1814 to 1818, was a British peer and Conservative politician.

He served under Lord Derby as Captain of the Honourable Corps of Gentlemen-at-Arms in 1852 and as Master of the Buckhounds between 1858 and 1859.

[2] Lord Sandwich served in the Earl of Derby's first administration as Captain of the Honourable Corps of Gentlemen-at-Arms from February[3] to December 1852[4] and was admitted to the Privy Council the same year.

[5] When the Conservatives returned to power under Derby in 1858 Sandwich was appointed Master of the Buckhounds,[6] an office he retained until the government fell the following year.

[8] He died in March 1884, aged 72, and was succeeded in his titles by his eldest son from his first marriage, Edward.