| Official Name: | Trn |
| Settlement Type: | Village |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | right |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Toplica District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Kuršumlija |
| Unit Pref: | Imperial |
| Population As Of: | 2002 |
| Population Total: | 30 |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 42.9°N 44°W |
Trn is a village in the municipality of Kuršumlija, Serbia. According to the 2002 census, the village has a population of 30 people.[1]