Drought stress is one of the most important factors that reduce turfgrass growth and quality. Restriction of water resources is the main problem of turfgrass in some regions of Iran. According to high water requirement of turfgrass, it is essential to find suitable turfgrasses for arid and semi-arid conditions. Using resistant species and varieties can be a useful management program for reducing water requirement in turfgrass. This study was carried out to evaluate drought resistance of four cultivars cool-season and warm- season turfgrass. Then Bermudagrass rhizomes and seeds of, Kentucky bluegrass, Rye grass and Tall fescue were cultivated at greenhouse in PVC pots (with diameter 20 cm and height 20 cm). The experiment was performed in factorial based on complete block design with four levels of drought stress (100%FC, 75%FC, 50%FC and 25%FC) and four cultivars of grasses (Tall fescue, Bermudagrass, Kentucky bluegrass and Rye grass) with three replications. After establishment of plants, drought stress has applied for two months. Color, drying percent, shoot fresh and dry weight, root fresh and dry weight, height, proline, electrolyte leakage, malondialdehyde, relative water content, chlorophyll content, carotenoid, catalase, superoxide dismutase and peroxidase were measured. The results show that application of drought stress declined the color, chlorophyll a, chlorophyll b, chlorophyll (a+b) and carotenoid which were significantly lower in Kentucky bluegrass. In comparison with 3 other grasses, Tall fescue has higher height and both shoot and root fresh and dry weight. Drought stress led to increasing drying and decline in the quality of grasses which was lower seen in Tall fescue. The intensive drought stress increased the Electrolyte leakage as well as malondialdehyde content which was mainly observed in Kentucky bluegrass. In the drought stress condition, the highest rise in proline was observed in Tall fescue. Besides in Tall fescue and Bermudagrass, the relative water content has decreased more slightly in comparison with other grasses. The activity of Peroxidase and Superoxide dismutase in Tall fescue has increased under drought stress and the higher stress led to a decrease in activity of enzyme. The lowest activity of Peroxidase and Superoxide dismutase were seen in Rye grass. The activity of catalase in all grasses increased under drought stress and the highest activity of enzyme were seen in Tall fescue, Bermudagrass and Kentucky bluegrass respectively. According to the results of current study Tall fescue, Bermudagrass, Kentucky bluegrass and Rye grass showed the best morphological and physiological characters in all of drought stress levels, respectively. Keywords : Antioxidant, Tall fescue, Electrolyte leakage, Bermudagrass.