|• Mayor||Franz Zwölbar (SPÖ)|
|• Total||26.42 km2 (10.20 sq mi)|
|Elevation||590 m (1,940 ft)|
|• Density||210/km2 (540/sq mi)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
Wernberg lies on the Drava River at the foot of the Ossiach Tauern range, east of Villach, and between Lake Ossiach on the north, Wörthersee on the east, and Lake Faak in the southern part of the municipality. It is located at the northwestern rim of the traditional settlement area of Carinthian Slovenes.
The municipal area comprises the cadastral communities of Neudorf (Nova vas), Sand (Pešče), Trabenig (Trabenče), Umberg (Umbar), and Wernberg (Vernberk).
Archaeological findings indicate an early settlement of the area already in Roman times. A castle near the village of Sternberg, today a ruin, was first mentioned in a deed issued at Saint Paul's Abbey about 1170/80. Wernberg itself first appeared in a document dated 17 November 1227 determining the demolition of a Drava bridge and the transfer of Werdenberch Castle to the Carinthian estates of the Bishopric of Bamberg.
The castle, situated on arock above the Drava river, was built under the rule of Duke Bernhard of Carinthia, it later passed to the Austrian Habsburgs. Held by the Khevenhüller noble family from 1519 onwards, the present-day Renaissance building was erected at the behest of the Carinthian governor George Khevenhüller (1533–1587). Part of the Ossiach Abbey estates from 1672, it is since 1935 a possession of the Catholic Missionary Sisters of the Precious Blood.
The municipality of Wernberg was established in 1850.
Seats in the municipal council (Gemeinderat) as of 2015 local elections:
- "Dauersiedlungsraum der Gemeinden Politischen Bezirke und Bundesländer - Gebietsstand 1.1.2018". Statistics Austria. Retrieved 10 March 2019.
- "Einwohnerzahl 1.1.2018 nach Gemeinden mit Status, Gebietsstand 1.1.2018". Statistics Austria. Retrieved 9 March 2019.