Gmajna may refer to:
Gmajna, Ivančna Gorica, a formerly independent settlement in the Municipality of Ivančna Gorica in central Slovenia Gmajna, Krško, a settlement in the Municipality of Krško in eastern Slovenia Gmajna (Ljubljana), a formerly independent settlement in the City Municipality of Ljubljana in central Slovenia Gmajna, Slovenj Gradec, a dispersed settlement in the City Municipality of Slovenj Gradec in northern Slovenia
See also Gmajna Tree Nursery Mass Grave, in Stari Trg, Slovenj Gradec, Slovenia