The population of Turkish hazel (Corylus colurna L.) was studied in the conditions of western (Povlen-Bukovi, Cacak) and eastern Serbia (Tupiznica, Zajecar, Sto, Veliki Krs and Miroc). Selected types showed significant differences in the morphological properties of fruit, kernel percentage and chemical content. Fruit flight varied between 13.8 mm and 19.1 mm while width and thickness ranged from 11.6 mm to 19.1 mm, and from 9.0 mm to 16.7 mm, respectively. Kernel size was as follows: hight - 11.3-15.4 mm, width - 8.0 - 12.8 mm, and thickness - 5.7 - 8.5 mm. Fruit mass averaged 1.88 g (0.63-2.86 g), whereas average kernel mass was 0.52 g (0.24 - 0.86 g). Kernel percentage amounted to 38.1% in the best types (31.68% on average). Protein content was 16.96%, and varied from 16.0% to 18.0%. Oils averaged 56.37% (49.14 - 65.15%). Hazelnut fruits proved to have high mineral matter content (2.39%).