Lamballe (French pronunciation: [lɑ̃bal]; Breton: Lambal; Gallo: Lanball) is a town and a former commune in the Côtes-d'Armor department in Brittany in northwestern France.

La Noue, the famous Huguenot leader, was mortally wounded in 1591 in the siege of the castle, which was dismantled in 1626 by Richelieu.

Charles Armand Tuffin, marquis de la Rouërie, hero of the American war of independence, died near Lamballe in 1793.

Crowning the eminence on which the town is built is a beautiful Gothic church (13th and 14th centuries), once the chapel of the castle of the counts of Penthièvre.

Although held on Thursday mornings only, this market is known as one of France's finest, with people travelling from far and wide to visit it and enjoy its gastronomic delights.