List of geological features on Iapetus
This is a list of named geological features on Iapetus. Most Iapetian geological features are named after characters and locations in the Chanson de Roland.
There is one named Iapetian regio (area of distinct albedo difference).
Regiones
| Regio | Named after |
| Cassini Regio | Giovanni Cassini |
There is one named Iapetian terra (large land mass).
Terrae
| Craters | Named after |
| Roncevaux Terra | Battle of Roncevaux Pass |
This is a list of craters on Iapetus.
Craters
| Terra | Named after |
| Almeric | Almeric |
| Baligant | Baligant |
| Basan | Basan |
| Berenger | Bérengier |
| Besgun | Besgun |
| Charlemagne | Charlemagne |
| Geboin | Geboin |
| Godefroy | Godefroy |
| Grandoyne | Grandoyne |
| Hamon | Hamon |
| Lorant | Lorant |
| Marsilion | Marsilion |
| Milion | Milon |
| Ogier | Ogier the Dane |
| Oliver | Oliver |
| Othon | Othon |
| Roland | Roland |
| Turpin | Turpin |