of the steep hillsides of the Rhone Valley, at the foot of the Swiss Alps, and is located at the point where the southwestern-flowing Rhone turns ninety degrees northward and heads toward Lake Geneva. The river La Drance flows from the southern Valais Alps (Wallis) through Martigny and joins the Rhone from the left just after Rhone's distinctive, almost rectangular change in direction.

Martigny has an area, (as of the 2004/09 survey),