© 2015, ALÖKI Kft. We classify and describe plant communities of rocky dry grasslands on carbonate bedrock in the southwestern regions of the Republic of Macedonia. We used our own field data and literature sources to compile a set of vegetation plots that have been stored in a vegetation database, data-mined and analyzed using numerical-analytical tools such as cluster analysis and ordination. Five distinct vegetation types, here interpreted as associations, were revealed and characterized using floristic composition, ecological conditions, life forms, chorological spectrum, and topological attributes. Four associations, namely the Petrorhagio haynaldianae-Chrysopogonetum grylli, the Scorzonero-Stipetum endotrichae, the Globulario-Centaureetum grbavacensis and the Astragalo-Helianthemetum marmorei, were recognized as new. All these associations belong to the Saturejo-Thymion (Astragalo-Potentilletalia, Festuco-Brometea).