Coordinates: 47°47′13″N 13°04′50″E / 47.7869°N 13.0806°E
Aigen is a district in the city of Salzburg, Salzburgerland, Austria and is known as one of the most expensive residential areas of the provincial capital. It is one of the 24 districts in which Salzburg is organized. The Salzach river is its western border and the municipality of Elsbethen is to the south. Many celebrities such as the Families Porsche and Piech, Franz Beckenbauer, Renate Thyssen-Henne, DJ Ötzi and others live in Aigen.
The word aigen, Old High German eigan, means to own and as a noun refers to the (inherited) property or the freedom to own property. Eigentuom is a Middle High German word and stands for the free right of possession. An Aigner is therefore a free, non-assessable farmer.
The Salzburg-Aigenrailway station (part of ÖBB lines), and the Youth Hostel Association are located here.
There is also the Authority for the Finance (Finanzamt).
Its famous Schloss Aigen (Aigen's Castle) was built in 1402. The Trapp family, on whom The Sound of Music was based, lived in a villa near the castle. Heinrich Himmler later lived in the Trapp residence in Aigen.