Werdenberg Castle is a castle in the municipality of Grabs of the Canton of St. Gallen in Switzerland. It is a Swiss heritage site of national significance.

It was the original seat of the County of Werdenberg in the Holy Roman Empire.

See also

2. Zitiervorschlag Lorenz Hollenstein: "Werdenberg", in: Historisches Lexikon der Schweiz (HLS), Version vom 03.10.2013. Online: , konsultiert am 12.04.2023.