翁特瓦尔登州（Unterwalden）是瑞士中部的一个古老州名，今天已分成上瓦尔登州（Obwalden）和下瓦尔登州（Nidwalden）。1291年，翁特瓦尔登州与乌里州、施维茨州结为同盟，之后翁特瓦登州分裂为上、下瓦尔登州，但上瓦尔登州的州政府于十四世纪才创建。

Unterwalden (Latinized as Sylvania, later also Subsylvania as opposed to Supersylvania) is the old name of a forest-canton of the Old Swiss Confederacy in central Switzerland, south of Lake Lucerne, consisting of two valleys or Talschaften, now organized as two half-cantons, an upper part, Obwalden, and a lower part, Nidwalden.