List of geological features on Io
This is a list of named geological features on Io, a moon of Jupiter. See also the list of mountains on Io and the list of paterae on Io.
Eruptive Centers
Eruptive centers on Io, locations typically where major volcanic activity was observed and characterized before the volcanic landform was, are named after the gods of volcanoes, lightning, and/or blacksmiths in various mythologies.| Volcano | Named after |
| Amirani | Amirani |
| Kanehekili | Kanehekili |
| Loki | Loki |
| Marduk | Marduk |
| Masubi | Ho-Masubi |
| Maui | Māui |
| Pele | Pele |
| Prometheus | Prometheus |
| Surt | Surtur |
| Thor | Thor |
| Volund | Volund |
| Zamama | Zamama |
Catenae
On Io, catenae are named after sun gods in various mythologies. In 2006, the use of the term catena was discontinued in favor of the patera . Below is a list of features that previously used the descriptor term catena.| Catena | Named after |
| Mazda Paterae | Ahura Mazda |
| Reshet Patera | Reshet |
| Tvashtar Paterae | Tvashtri |
Fluctūs
Ionian fluctus are named after fire and thunder gods in various mythologies, or after locations in Greek mythology associated with Io.| Fluctus | Named after |
| Acala Fluctus | Acala |
| Arinna Fluctus | Arinna |
| Donar Fluctus | Donar |
| Euboea Fluctūs | Euboea |
| Fjorgynn Fluctus | Fjorgyn |
| Kanehekili Fluctus | Kanehekili |
| Lei-Kung Fluctus | Lei Gong |
| Lei-zi Fluctus | Lei Zi |
| Marduk Fluctus | Marduk |
| Masubi Fluctus | Ho-Masubi |
| Sobo Fluctus | Sobo |
| Tsui Fluctus | Tsui |
| Tung Yo Fluctus | Tung Yo |
| Uta Fluctus | Uta |
Mensae
Ionian mensae are named after mythological figures associated with fire or with the nymph Io.| Mensa | Named after |
| Capaneus Mensa | Capaneus |
| Echo Mensa | Echo |
| Epaphus Mensa | Epaphus |
| Hermes Mensa | Hermes |
| Iynx Mensa | Iynx |
| Pan Mensa | Pan |
| Prometheus Mensa | Prometheus |
| Telegonus Mensae | Telegonus, husband of Io |
| Tvashtar Mensae | Tvashtar |
Montes
Ionian montes are named after people and places associated with the nymph Io, and sun and fire gods in various other mythologies.Paterae
Ionian paterae are named after sun gods and fire gods in various mythologies.Plana
Ionian plana are named after locations in Greek mythology associated with the nymph Io.| Planum | Named after |
| Argos Planum | Argos |
| Danube Planum | Danube River |
| Dodona Planum | Dodona |
| Ethiopia Planum | Ethiopia |
| Hybristes Planum | Hybristes |
| Iopolis Planum | Iopolis |
| Lyrcea Planum | Lyrcea |
| Nemea Planum | Nemea |
Regiones
Ionian regiones are mostly named after locations in Greek mythology associated with the nymph Io.| Regio | Named after |
| Bactria Regio | Bactria |
| Bosphorus Regio | Bosphorus |
| Bulicame Regio | Bulicame |
| Chalybes Regio | Chalybes |
| Colchis Regio | Colchis |
| Illyrikon Regio | Illyria |
| Lerna Regio | Lerna |
| Media Regio | Media |
| Mycenae Regio | Mycenae |
| Tarsus Regio | Tarsus |
Tholi
Ionian tholi are named after mythological figures associated with fire or with the nymph Io.| Tholus | Named after | Coordinates |
| Apis Tholus | Apis | |
| Inachus Tholus | Inachus | |
| Tsui Goab Tholus | Tsui |