| Official Name: | Gmajna |
| Pushpin Map: | Slovenia |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Slovenia |
| Subdivision Type: | Country |
| Subdivision Name: | Slovenia |
| Subdivision Type1: | Traditional region |
| Subdivision Name1: | Lower Carniola |
| Subdivision Type2: | Statistical region |
| Subdivision Name2: | Lower Sava |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Krško |
| Area Total Km2: | 5.36 |
| Population As Of: | 2002 |
| Population Total: | 153 |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Coordinates: | 45.9043°N 15.3695°W |
| Elevation M: | 165.8 |
| Postal Code: | 8274 |
| Footnotes: | [1] |
Gmajna (in Slovenian pronounced as /ˈɡmaːi̯na/) is a settlement in the Municipality of Krško in eastern Slovenia. The A2 motorway from Ljubljana to Zagreb runs through the territory of Gmajna. The area is part of the traditional region of Lower Carniola. It is now included in the Lower Sava Statistical Region.[2]
The name Gmajna means 'commons', referring to land that was jointly owned and used by the village community. The Slovenian common noun gmajna is a borrowing from Middle High German gemeine, with the same meaning, and is found in other Slovene toponyms such as Gmajna near Slovenj Gradec as well as in the diminutive form Gmajnica.[3]
There is a small chapel-shrine in the settlement dedicated to the Virgin Mary. It was built in the early 20th century.[4]