The geological features of Charon, the largest moon of Pluto, are being mapped by scientists using data from the New Horizons spacecraft. The team has given provisional names to the most prominent.
, only some of the names have been officially recognized by the International Astronomical Union, which has agreed that names for features on Charon should come from the following:
Some features discovered by the New Horizons mission have been given provisional names based on various science fiction and fantasy franchises, including Star Wars, Star Trek, Doctor Who, Alien, Firefly, and Macross. These names remain unofficial until accepted by the IAU.
On 11 April 2018, the IAU announced that several of the feature names had been officially recognized. As of December 2025, this list contains 55 geological features, 14 of which are official.
A chasma (plural chasmata) is a deep, elongated, steep-sided depression. Charonian chasmata are named after vessels in fiction. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
Craters on Charon are named after characters associated with science fiction and fantasy. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A dorsum (plural dorsa) is a ridge. Charon's only dorsum is named after an author. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A macula (plural maculae) is a dark spot. Charonian maculae are named after fictional destinations. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A mons (plural montes) is a mountain. Montes on Charon are named after authors and artists. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A planitia (plural planitiae) is a large plain. Charon's only planitia is named after a fictional destination. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A regio (plural regiones) is a region geographically distinct from its surroundings. Charon's only regio is named after a fictional destination. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A terra (plural terrae) is an extensive landmass or highland. Charon's only terra is named after a fictional destination. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.
A vallis (plural valles) is valley. Charon's only vallis is named after a vessel in fiction. The following is a list of official and unofficial names chosen by the New Horizons team. Names that have been officially approved are labeled as such.