What is ancient Greek currency called?

For a period spanning over 10 centuries, Ancient Greeks used a currency by the name of Drachma. Drachmas were coined money and came in round coins of different sizes based on the worth.

The Drachma was used as a form of currency as early as 1100 B.C. and was a form of "bullion:" bronze, copper or iron ingots denominated by weight. It was the standard unit of silver coinage at most ancient Greek mints. The name obol was used to describe a coin that was one-sixth of a drachma. Not all coins appeared the same, though, because each city had its own mint with different marks for their coins.