| Official Name: | Smast |
| 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: | Slovenian Littoral |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Gorizia |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Kobarid |
| Area Total Km2: | 2.6 |
| Population As Of: | 2002 |
| Population Total: | 177 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.234°N 13.6148°W |
| Elevation M: | 243.9 |
| Footnotes: | [1] |
Smast (in Slovenian pronounced as /ˈsmaːst/) is a village on the left bank of the Soča River in the Municipality of Kobarid in the Littoral region of Slovenia.