| Official Name: | Niaku |
| Native Name: | نياكو |
| Settlement Type: | Village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Gilan |
| Subdivision Type2: | County |
| Subdivision Name2: | Astaneh-ye Ashrafiyeh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Kisom |
| Population As Of: | 2006 |
| Population Total: | 991 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 37.2422°N 49.9514°W |
Niaku (Persian: نياكو, also Romanized as Nīākū, Neyākū, and Niya Kooh) is a village in Kisom Rural District, in the Central District of Astaneh-ye Ashrafiyeh County, Gilan Province, Iran. At the 2006 census, its population was 991, in 287 families.