Argolis (Greek, Modern: Αργολίδα Argolida, Ancient/Katharevousa: Ἀργολίς—still the official, formal name; see also List of traditional Greek place names) is one of the fifty-one prefectures of Greece. It is located in the eastern part of the Peloponnese. Most arable land lies in the central part. Its primary agricultural resources are oranges and olives. Beaches are found in the south and east. Mountains and hills dominate the west, northeast and east.

It is bounded by Arcadia to the west and southwest, Corinthia to the north, the Saronic Gulf and the Attica prefecture and the Troezen area to the east and southeast by water, and the Argolic Gulf to the south. (The Argolid of ancient times included Troezen).

Its mountain ranges include Lyrkeia and Trachy in the northwest.