| Tigak | |
|---|---|
| Region | New Ireland Province, Papua New Guinea |
Native speakers | (6,000 cited 1991) |
Austronesian
| |
| Latin | |
| Language codes | |
| ISO 639-3 | tgc |
| Glottolog | tiga1245 |

Tigak (or Omo) is an Austronesian language spoken by about 6,000 people (in 1991) in the Kavieng District of New Ireland Province, Papua New Guinea.
The Tigak language area includes the provincial capital, Kavieng.
Phoneme inventory of the Tigak language:
| Labial | Alveolar | Velar | ||
|---|---|---|---|---|
| Nasal | m | n | ŋ | |
| Plosive | voiceless | p | t | k |
| voiced | b | g | ||
| Rhotic | r | |||
| Fricative | voiceless | β | s | |
| lateral | ɮ | |||
/r/ can also be realized as [ɾ] allophonically. Both /k, ɡ/ are back-released as [k̠, ɡ̠].
| Front | Central | Back | |
|---|---|---|---|
| High | i | u | |
| Mid | e | ɔ | |
| Low | a |
| Phoneme | Allophones |
|---|---|
| /i/ | [i], [ɪ], [y] |
| /e/ | [e], [ɛ] |
| /a/ | [ʌ], [a] |
Two vowels /i u/ in word-initial form can also be released as consonantal allophones [w j].
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