List of geological features on 243 Ida and Dactyl
This is a list of named geological features on asteroid 243 Ida and its moon, Dactyl.
Idan regiones (geologically distinct areas) are named after the discover of the asteroid, and the places where he worked.
Ida
Regiones
| Regio | Named after |
| Palisa Regio | Johann Palisa |
| Pola Regio | Pola |
| Vienna Regio | Vienna |
The only named dorsum on Ida is Townsend Dorsum, named after Tim E. Townsend, a member of the Galileo probe imaging team. Dorsa
| Crater | Named after |
| Afon | Novy Afon Cave, Abkhazia |
| Atea | Atea Cave, Papua New Guinea |
| Azzurra | Azzurra Grotto, Italy |
| Bilemot | Bilemot Cave, Korea |
| Castellana | Castellana Cave, Italy |
| Choukoutien | Choukoutien, China |
| Fingal | Fingal's Cave, UK |
| Kartchner | Kartchner Caverns, AZ, USA |
| Kazumura | Kazumura Cave, HI, USA |
| Lascaux | Lascaux Cave, France |
| Lechuguilla | Lechuguilla Cave, NM, USA |
| Mammoth | Mammoth Cave, KY, USA |
| Manjang | Manjang Cave, Korea |
| Orgnac | Orgnac Cave, France |
| Padirac | Padirac Cave, France |
| Peacock | Peacock Cave, FL, USA |
| Postojna | Postojna Cave, Slovenia |
| Sterkfontein | Sterkfontein, South Africa |
| Stiffe | Stiffe Cave, Italy |
| Undara | Undara Cave, Australia |
| Viento | Viento Cave, Spain |
Dactylian craters are named after the mythological Dactyls.
Dactyl
| Crater | Named after |
| Acmon | Acmon |
| Celmis | Celmis |