| Official Name: | Aynajik |
| Native Name: | عين جيک |
| Settlement Type: | village |
| Pushpin Map: | Iran |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Zanjan |
| Subdivision Type2: | County |
| Subdivision Name2: | Khodabandeh |
| Subdivision Type3: | Bakhsh |
| Subdivision Name3: | Central |
| Subdivision Type4: | Rural District |
| Subdivision Name4: | Karasf |
| Population As Of: | 2006 |
| Population Total: | 818 |
| Population Density Km2: | auto |
| Timezone: | IRST |
| Utc Offset: | +3:30 |
| Timezone Dst: | IRDT |
| Utc Offset Dst: | +4:30 |
| Coordinates: | 36.0167°N 48.5356°W |
Aynajik (fa|عين جيک, also Romanized as ‘Aynajīk, Ainajek, ‘Eynajīk, ‘Eynejīk, and Eynjik; also known as Aynadzhek and Enjag) is a village in Karasf Rural District, in the Central District of Khodabandeh County, Zanjan Province, Iran. At the 2006 census, its population was 818, in 192 families.