This study was carried out during the 2019 production season in Diyarbakır Dicle University Faculty of Agriculture, Department of Field Crops, where is naturally infected with verticillium wilt disease in terms of epidemic conditions. The study was conducted to determine the status of cotton genotypes resistant to wilt disease (Verticillium dahliae kleb.). In the study, besides 124 cotton genotypes, 4 registered cultivars (ST-468, ES-1, Edessa, DP-499) were also used as controls. The research was carried out according to the augmented trial design in a total of 5 blocks whose each 4 block were consisted of 29 rows and one block was comprised of 28 rows. As a result, it was determined that there were significant differences at the p≤0.01 level between genotypes in terms of all the examined characteristics. Moreover,  the leaf disease severity index values were ​​ between 0.295-2.970 and the disease severity index values ​​of the stem section ranged between 0.042-2.948 at the time of 50-60% boll opening ranged. A positive correlation between leaf disease severity index and stem section disease severity index values was found ​​at 50-60% boll opening time for different cotton genotypes. The findings will shed light on the selection and identification of resistant/tolerant rootstocks in future cotton breeding programs.