| Nafi | |
| Also Known As: | Sirak |
| Region: | Markham Valley, New Guinea |
| Coordinates: | -6.4335°N 146.8256°W |
| Speakers: | 160 |
| Date: | 1988 |
| Ref: | e18 |
| Familycolor: | Austronesian |
| Fam2: | Malayo-Polynesian |
| Fam3: | Oceanic |
| Fam4: | Western Oceanic |
| Fam5: | Huon Gulf |
| Fam6: | Markham |
| Fam7: | Lower Markham |
| Fam8: | Busu |
| Iso3: | srf |
| Glotto: | nafi1237 |
| Glottorefname: | Nafi |
Nafi, also known as Sirak, is an Austronesian language of Morobe Province, Papua New Guinea.
It is spoken in the single village of Nambom (also known as Banzain village) (-6.4335°N 146.8256°W) in Gamiki ward, Wain-Erap Rural LLG. Ethnic Nafi people living in Popof village (-6.4387°N 146.806°W) have since switched to speaking Nakama, a Trans-New Guinea language. Intermarriages frequently occur between the two villages.[1]