Abstract: Turkey as a consequence of its exceptionally diverse topographical structure and differing climatic features is one of the world’s richest countries of the world as regards to the diversity of the plant species. The Mediterranean region takes the first place in the country, in relation with the number of species grown in a single region. The aim in this study conducted in the rangelands of Isparta which is located in the Mediterranean regio between the years of 2008-2009 is to present the plant species diversity of the local rangelands. In the study area, 302 plant taxa belonging to 43 families and 190 plant genera were identified and 28, 39 and 234 of these belonged to the graminae, legume and other families, respectively. The family that is represented with the most number of taxa with 41 taxa is the Asteraceae family. It is followed by Fabaceae, Lamiaceae and Poaceae families, respectively with 39, 30 and 29 taxa. Among the 302 plant taxa, 84 of the plants are annual; 3 of them are annual and biennial plants; 14 of the plants are biennial and 201 of them are perennial plants. Among the taxa encountered in the study area, 73 of them were recorded as the element of the Mediterranean region; 64 taxa were recorded as the element of Irano-Turanian region; 17 of them were recorded as the element of Euro-Siberian region and 148 taxa were recorded as widepspread or belonging to an unknown region. Moreover, 82 plant taxa were endemic and the endemism ratio was identified as 27.15%.