Savoy (Savoie)
Mt. Blanc is located in both Italy and France.Mont Blanc is on the border of France and Italy; i.e., is is located in both countries.
The alps
Mont Blanc.
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mount blanc
Le Mont Blanc is located east-south-east of France, on the border with Italy and just above Switzerland.
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Mont Blanc is in the Mont Blanc massif, which is a sub-range of the Graian Alps.
Mont Blanc is 1,000,50 metres wide
It is generally accepted that the France-Italy border runs directly over the peak of Mont Blanc, which means the mountain and its highest point are in both France and Italy. See Sources and related links for more information.