| Piu | |
| States: | Papua New Guinea |
| Region: | Morobe Province |
| Speakers: | 100 |
| Date: | 2000 |
| Ref: | e18 |
| Familycolor: | Austronesian |
| Fam2: | Malayo-Polynesian |
| Fam3: | Oceanic |
| Fam4: | Western Oceanic |
| Fam5: | North New Guinea ? |
| Fam6: | Ngero–Vitiaz ? |
| Fam7: | Huon Gulf |
| Fam8: | South Huon Gulf |
| Fam9: | Hote–Buang |
| Fam10: | Buang |
| Map2: | Lang Status 60-DE.svg |
| Iso3: | pix |
| Glotto: | piuu1237 |
| Glottorefname: | Piu |
Piu is an Oceanic language in the upper Watut River area of Morobe Province, Papua New Guinea.