Kopaniny (German: Krugsreuth) is a village in Karlovy Vary Region, Czech Republic.

It is one of the nine municipal parts of Aš.

Kopaniny lies 5 kilometres northeast from Aš, about 673 meters above sea level, and is surrounded by forests.

Kopaniny was probably founded in the 12th century, but it is first mentioned in 1315, as a property of the Feiltsch family from Sachsgrün.

In the middle of the 14th century village belonged to Neuberg property, and in the late 14th century it was bought by the Zedtwitz.