Adnet is situated near Hallein in the metropolitan area of Salzburg. Urban districts are: Adnet, Riedl, Spumberg, Waidach, Wimberg. The highest point is just beneath the Jägernase (a mountain slope of the local mountain Schlenken) about 1,501 metres (4,925 ft) above sea level.
The coat of arms of the municipality: on a golden shield between three red-marmoreal round stones is a black lion, in the right hand it is holding a black stonemason's hammer on its red shaft.
The name originates from the Celtic (Atanate, Atanat, Attnat). It means swamp (situated by the water).
Adnet is twinned with: