| Official Name: | Trebija |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Upper Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Upper Carniola |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Gorenja Vas–Poljane |
| Area Total Km2: | 2.1 |
| Population As Of: | 2020 |
| Population Total: | 208 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.0971°N 14.1018°W |
| Elevation M: | 434.5 |
| Footnotes: | [1] |
Trebija (in Slovenian pronounced as /tɾeˈbiːja/; in older sources also Terbija,[2] German: Terbia[2]) is a settlement in the Municipality of Gorenja Vas–Poljane in the Upper Carniola region of Slovenia. It lies on the left bank of the upper course of the Poljane Sora River.[3]