| Diodio | |
| Also Known As: | West Goodenough |
| States: | Papua New Guinea |
| Region: | Milne Bay Province (Goodenough Island) |
| Date: | 2000 |
| Ref: | e18 |
| Familycolor: | Austronesian |
| Fam2: | Malayo-Polynesian |
| Fam3: | Oceanic |
| Fam4: | Western Oceanic |
| Fam5: | Papuan Tip |
| Fam6: | Nuclear Papuan Tip |
| Fam7: | North Papuan Mainland – D'Entrecasteaux |
| Fam8: | Bwaidoga |
| Iso3: | ddi |
| Glotto: | diod1237 |
| Glottorefname: | Diodio |
Diodio, or West Goodenough, is an Austronesian language spoken in Milne Bay Province, Papua New Guinea, on Goodenough Island, which it shares with Bwaidoka, Iduna, and Kaninuwa.