| Ratsua | |
| States: | Papua New Guinea |
| Region: | Bougainville |
| Speakers: | ca. 200 |
| Familycolor: | Austronesian |
| Fam3: | Oceanic |
| Fam4: | Western |
| Fam5: | Meso-Melanesian |
| Fam6: | Northwest Solomonic |
| Fam7: | Nehan–Bougainville |
| Fam8: | Saposa–Tinputz |
| Iso3: | none |
| Glotto: | none |
| Elp: | 10309 |
| Elpname: | Ratsua |
Ratsua is an Austronesian language of Bougainville, Papua New Guinea.