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| Name | Latitude | Longitude | Diameter | Added | Origin |
| Bactria Regio | 45.8S | 123.4W | 0.0 | 1979 | Io passed through this area of ancient Iran in her wanderings |
| Bosphorus Regio | 0.0N | 120.0W | 1200.0 | 1997 | "Ford of the Cow"; Io wandered through here while trying to escape from the gadfly |
| Chalybes Regio | 45.5N | 83.2W | 0.0 | 1979 | Greek; Io passed through here in her wanderings |
| Colchis Regio | 5.3N | 199.8W | 0.0 | 1979 | Greek; Io passed through this part of Asia Minor in her wanderings |
| Illyrikon Regio | 72.0S | 160.0W | 700.0 | 1997 | Io passed by here in her wanderings |
| Lerna Regio | 64.0S | 292.6W | 0.0 | 1979 | Greek; meadows of Lyrcea |
| Media Regio | 4.6N | 58.8W | 0.0 | 1979 | Greek; Io passed through this part of Iran in her wanderings |
| Mycenae Regio | 37.3S | 165.9W | 0.0 | 1979 | Greek; in some legends, Io was transformed there |
| Tarsus Regio | 43.7S | 61.4W | 0.0 | 1979 | Io passed through here in her wanderings |
