This study was conducted at Abo Jarash farm, Faculty of Agriculture, Damascus University In order to determine the response of three local varieties of potato (Sponta, Draja, Diamont) to salinity stress with different concentration of NaCl solution (0,50, 100, 150, 200 mM). The results indicated that the existence of a inverse correlation between increased concentrations of salts in the solution and the rate of plant height, leaf area, and the percentage of leaf dry weight, and the proportion K+/ Na+., and the productivity was declined with a proportional rate 22< 32, and 48% for the varieties of Sponta, Draja, Diamont, respectively. Results indicated the existence of reverse relationship between increasing salt concentration in the medium and plant height, Leaf area, dry weight of the leaves and K+/Na+ ration in addition to the decline in the productivity of studied varieties. The results also showed variations in the extent of tolerance between studied varieties to salinity stress where Sponta was the most tolerant, followed by Draja and Diamont was the less tolerant and this was reflected in terms of higher germination and increasing the mean of plant height, Leaf area and dry weight of plant.