Winnweiler is a municipality in the Donnersbergkreis, in Rhineland-Palatinate, Germany. It is situated on the upper course of the river Alsenz, approx. 15 km (9.3 mi) north-east of Kaiserslautern. Winnweiler is the seat of the Verbandsgemeinde Winnweiler. Winnweiler station is on the Alsenz Valley Railway (Alsenztalbahn), running between Hochspeyer and Bad Münster am Stein.