The Wotanstein (English: Wotan's stone), also known as 'Wodanstein' or earlier on 'Malstein', is a small megalith or menhir situated close to the village of Maden, Schwalm-Eder-Kreis, Hesse, Germany.

The megalith is situated on the south-west corner of the village of Maden, on an elevation between the streams of the Goldbach to the east and Henkelborn to the west.

However, it is presumed from finds at other similar megaliths in the area (e.g. Riesenstein) that it was erected in the 3rd century BC.

According to oral tradition, during the Seven Years' War (1756–1763) it was excavated because it was rumoured that treasure was buried under it, but remains of human bones were found instead.

It is said that the Devil, who lived on Mader Stein (or the nearby Lamsberg hill), wanted to destroy the church with a stone.