Le Locle (French pronunciation: [lə lɔkl]; German: Luggli) is a municipality in the Canton of Neuchâtel in Switzerland.

It is situated in the Jura Mountains , a few kilometers from the city of La Chaux-de-Fonds . It is the third smallest city in Switzerland (in Switzerland a place needs more than 10,000 inhabitants to be considered a city).

Le Locle is known as a center of Swiss watchmaking, even cited as the birthplace of the industry, with roots dating back to the 1600s. The municipality has been home to manufactures such as Favre-Leuba, Mido, Zodiac, Tissot, Ulysse Nardin, Zenith, Montblanc, Certina as well as Universal Genève, before the latter company relocated to Geneva . The town's history in watchmaking is documented at one of the world's premier horological museums, the Musée d'Horlogerie du Locle, Monts Castle, located in a 19th-century country manor on a hill north of the city.