Archarnae was the largest deme of ancient Attica; it was located in the northwest part of the Attic plain, around Menidi, and about 10 km due north of Athens. The Acharnians chiefly grew grain, grapes, and olives, although Aristophanes in his comedy The Acharnians caricatures them as charcoal-burners. Pindar characterizes them as notably brave.

A tholos tomb at Menidi suggests Acharnae was once an independent entity; a temple to Ares was later moved to the Athenian Agora.