| Official Name: | Trbušnica |
| Settlement Type: | Village (Selo) |
| Pushpin Map: | Serbia |
| Pushpin Label Position: | right |
| Subdivision Type: | Country |
| Subdivision Name: |  Serbia |
| Subdivision Type1: | District |
| Subdivision Name1: | Mačva District |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Loznica |
| Unit Pref: | Metric |
| Area Total Km2: | 12.45 |
| Population As Of: | 2011 |
| Population Total: | 836 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 44.4833°N 30°W |
| Elevation M: | 296 |
Trbušnica (Serbian: Трбушница) is a village located in the municipality of Loznica, western Serbia. According to the 2011 census, the village has a population of 836 inhabitants. A border crossing between Serbia and Bosnia and Herzegovina is located in the village. The youngest soldier of World War I, Momčilo Gavrić was born here. Also, Luka Kojić