沙尔尼茨（德语：Scharnitz）是奥地利蒂罗尔州因斯布鲁克兰县的一个市镇。总面积158.77平方公里，总人口1291人，人口密度8.1人/平方公里（2011年）。

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Scharnitz is a municipality in the district of Innsbruck-Land in the Austrian state of Tyrol located16.4 kilometres (10.2 mi) north of Innsbruck and 9 kilometres (5.6 mi) from Seefeld in Tirol on the German border. It is one of the largest municipalities and has 12 parts. The village was founded in the early Middle Ages and was once an important commercial route between Germany and Italy. The main source of income is tourism, both in summer and winter. Scharnitz is the western entry point to the Hinterau valley, where the source of river Isar is located.