Schwanau is an island in Lake Lauerz, located in the canton of Schwyz in Central Switzerland.

Administratively the island lies within the municipality of Lauerz, but it is owned by the canton of Schwyz.

[1][2] The island is situated some 125 m (410.1 ft) off the south shore of the lake, close to the lakeside village of Lauerz.

Access for persons with limited mobility is possible by use of a specially adapted boat and an inclined elevator to the terrace level where the castle, chapel and restaurant are located.

In 1808 the council of the church in Schwyz sold the island to General Ludwig Auf der Maur on the provision that he rebuild the chapel.