| Official Name: | Gaj |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Styria |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Savinja |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Šmarje pri Jelšah |
| Area Total Km2: | 0.69 |
| Population As Of: | 2002 |
| Population Total: | 63 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 46.2228°N 15.5524°W |
| Elevation M: | 235.3 |
| Footnotes: | [1] |
Gaj (in Slovenian pronounced as /ˈɡaːi̯/) is a small settlement east of Šmarje pri Jelšah in eastern Slovenia. The area is part of the traditional region of Styria and is now included in the Savinja Statistical Region.[2]