| Official Name: | Janja |
| Native Name: | Јања |
| Settlement Type: | Village |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Zaječar District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Knjaževac |
| Unit Pref: | Imperial |
| Population As Of: | 2002 |
| Population Total: | 37 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 43.4167°N 53°W |
Janja is a village in the municipality of Knjaževac, Serbia. According to the 2002 census, the village has a population of 37 people.[1]