The Jura triangle is a Swiss watchmaking region. It is a rough triangle bounded by La Chaux-de-Fonds to the West, along the Suze River to Bienne-Biel to the East, and Saignelégier to the North. La Chaux-de-Fonds and Bienne-Biel are sometimes not considered to be part of the triangle since they are larger cities with many large manufacturers, while most Jura triangle towns and manufacturers are much smaller. The Jura triangle crosses Canton boundaries, from the Canton of Neuchâtel to the West, the Canton of Bern to the East, and the Canton of Jura to the North.

The major watchmaking towns in the Jura triangle are as follows

• Canton of Neuchâtel
  • La Chaux-de-Fonds (and perhaps West to Le Locle) - TAG Heuer
  • Fontainemelon - Frédéric Japy
• Canton of Bern
  • Sonvilier - Chopard (now Geneva)
  • Saint-Imier - Longines, Heuer (now La Chaux-de-Fonds), Breitling (now Grenchen), COSC testing facility, Auguste Agassiz, Moeris, Flückiger & Fils/Patek Philippe
  • Villeret - Minerva/Montblanc Manufacture (former Blancpain building), Nivarox-FAR (former Cartier building)
  • Cormoret
  • Courtelary - Langel
  • Cortébert - Cortébert
  • Corgémont
  • Sonceboz
  • Tavannes - Tavannes/Cyma, Roventa-Henex
  • Les Reussilles - Soprod
  • Tramelan - Armand Nicolet, Auguste Reymond, Record, Horia, Progress Watch/STT/Dimier 1738 (Bovet)
  • Bienne-Biel (and perhaps east to Brügg)
• Canton of Jura
  • Les Bois
  • Le Boéchet - Rudis Sylva
  • Le Creux-des-Biches
  • Le Breuleux - Richard Mille
  • Le Noirmont - Paul Picot
  • Saignelégier - Maurice Lacroix, Aerowatch, Soprod