Earl of Sandwich is a noble title in the Peerage of England, held since its creation by the House of Montagu. It is nominally associated with Sandwich, Kent. It was created in 1660 for the prominent naval commander Admiral Sir Edward Montagu. He was made Baron Montagu of St Neots, of St Neots in the County of Huntingdon, and Viscount Hinchingbrooke, at the same time, also in the Peerage of England. The viscountcy is used as the courtesy title by the heir apparent to the earldom. A member of the prominent Montagu family, Lord Sandwich was the son of Sir Sidney Montagu, youngest brother of Henry Montagu, 1st Earl of Manchester, and Edward Montagu, 1st Baron Montagu of Boughton.

Sandwich is a town and civil parish in the Dover District of Kent, south-east England. It lies on the River Stour and has a population of 4,985. Sandwich was one of the Cinque Ports and still has many original medieval buildings, including several listed public houses and gates in the old town walls, churches, almshouses and the White Mill. While once a major port, it is now 2 miles (3 km) from the sea due to the disappearance of the Wantsum Channel. Its historic centre has been preserved. Sandwich Bay is home to nature reserves and two world-class golf courses, Royal St George's and Prince's. The town is also home to many educational and cultural events. Sandwich also gave its name to the food by way of John Montagu, 4th Earl of Sandwich, and the word sandwich is now found in several languages.