|Intercommunality||Cœur de Maurienne|
|Elevation||489–1,200 m (1,604–3,900 ft)
(avg. 566 m or 1,857 ft)
|Land area1||11.51 km2 (4.44 sq mi)|
|- Density||739 /km2 (1,910 /sq mi)|
|INSEE/Postal code||73248/ 73300|
|1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km² (0.386 sq mi or 247 acres) and river estuaries.|
|2 Population without double counting: residents of multiple communes (e.g., students and military personnel) only counted once.|
It lies in the Maurienne, the valley of the River Arc. It was also an episcopal see of Savoy during the Ancien Régime and again from 1825 to 1966. Its original name was simply Maurienne, or Moriana in Italian and Latin.
The oldest possessions of the Counts of Savoy were the countships of Maurienne, Savoy proper (the district between Arc, Isère, and the middle course of the Rhone), and Belley, with Bugey as its chief town.
The Duchy of Savoy, which had been a French-speaking province under the sovereignty of the Kingdom of Sardinia-Piedmont, was invaded by Revolutionary France, but restored to Piedmont in 1815. It became part of France in 1859, after the Second Italian War of Independence.
The town was reached by the Aix-les-Bains—Saint-Jean-de-Maurienne railway in 1857.
Twin towns 
Saint-Jean-de-Maurienne is twinned with:
See also 
- Opinel knife
- Col de la Croix de Fer
- Agreement of St.-Jean-de-Maurienne
- Communes of the Savoie department
- This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). Catholic Encyclopedia. Robert Appleton Company.  & passim
- Besson, Memoires pour l'histoire ecclésiastique des diocèses de Genève, Tantaise, Aoste et Maurienne, Nancy, 1739; new ed. Moutiers, 1871
- Media related to Saint-Jean-de-Maurienne at Wikimedia Commons
- Town council website
- Picture of Saint-Jean-de-Maurienne Cathedral