List of volcanic features on Io

Volcanoes that were first observed as an active feature from observations of a volcanic plume fit under the category of "Eruptive Center" and do not use a descriptive term, though portions of these features may have also received names that do use a descriptive term, like Prometheus Patera or Masubi Fluctus.

Finally, channels carved by volcanic lava flows through thermal erosion use the term vallis or the plural valles.

Coordinate, diameter, and name source come from the IAU's Solar System Nomenclature Website.

[2] In 2006, the use of the term catena /kəˈtiːnə/, for Ionian volcanoes with multiple depressions, was discontinued in favor of the plural paterae /ˈpætərə/.

[2] Ionian shield volcanoes or tholi are named after mythological figures associated with fire or with the nymph Io.