George John Montagu, 6th Earl of Sandwich (4 February 1773 – 21 May 1818) was the son of John Montagu, 5th Earl of Sandwich and Lady Mary Henrietta Powlett. He was styled Viscount Hinchingbrooke from 1790 until in 1814 when, his elder half-brother having died, he inherited the earldom from his father, together with the Hinchingbrooke estate in Huntingdonshire. He was educated at Eton College (1780-90) and Trinity College, Cambridge (1790-92). He was MP for Huntingdonshire from 1794 to 1814. He married in 1804 Lady Louisa Mary Ann Julia Harriet Lowry-Corry, daughter of Armar Lowry-Corry, 1st Earl Belmore and Lady Harriet Hobart. Together they had two daughters and one son, John William, who would succeed his father in the earldom: He died in Rome in 1818.