| Official Name: | Niak |
| Native Name: | نياك |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Mazandaran |
| Subdivision Type2: | County |
| Subdivision Name2: | Amol |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Larijan |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Bala Larijan |
| Population As Of: | 2006 |
| Population Total: | 210 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 35.8725°N 52.1889°W |
Niak (Persian: نياك, also Romanized as Nīāk and Niyāk, Neyāk) is a village in Bala Larijan Rural District, Larijan District, Amol County, Mazandaran Province, Iran. At the 2006 census, its population was 210, in 61 families. It is located on the Haraz road between Amol and Tehran.
The Seyyed Hasan-e Valli (Seyyed Esmail Allizadeh) shrine is located in the village.