Almaden may refer to:
In Spain:

• Almadén, town in Spain notable for its mercury mines

Almadén is a town and municipality in the Spanish province of Ciudad Real, within the autonomous community of Castile-La Mancha. The town is located at 4° 49' W and 38° 46' N and is 589 meters above sea level. Almadén is approximately 300 km south of Madrid in the Sierra Morena. The name Almadén is from the Arabic word al-maʻdin, meaning 'the mine'.