Annweiler am Trifels (German: [ˈanvaɪlɐ ʔam ˈtʁiːfɛls] ⓘ), or Annweiler is a town in the Südliche Weinstraße district, in Rhineland-Palatinate, Germany.

It is situated on the river Queich, 12 km west of Landau.

Annweiler is situated in the Southern part of the Palatinate forest called the Wasgau, and is surrounded by high hills which yield a famous red sandstone.

On the Sonnenberg (493 m) lie the ruins of the castle of Trifels, in which Richard Coeur de Lion was imprisoned from 31 March to 19 April 1193.

In a 1911 edition of the Brockhaus Enzyklopädie, the area around Annweiler was referred to as "Pfälzer Schweiz".