Notable mountains ranges are the Oligyrtos in the northwest, Lyrkeio and Ktenia in the west, and Arachnaio and Didymo in the east.

Argolis has land borders with Arcadia to the west and southwest, Corinthia to the north, and the Islands regional unit (Troezen area) to the east.

Parts of the history of the area can be found in the articles on Argos, Mycenae, Epidaurus, Nafplio, Troezen, Ermioni, Kranidi, Tiryns and Tolo.

From 1833 to 1899, Argolis was part of Argolidocorinthia, which included present Corinthia, Hydra, Spetses and Kythira.

These are (number as in the map in the infobox):[2] As a part of the 2011 Kallikratis government reform, the regional unit Argolis was created out of the former prefecture Argolis (Greek: Νομός Αργολίδας).