The oil seed crops are economically very important, because of their big contribution in providing the energy for both human and livestock. The increasing of demand for the vegetable oil in the world market have caused some countries to pay more attention to oilseed production and expanding the research programs for these crops. Since water deficit stress is an important factor limiting production of the field crops in many areas of the world, this study was conducted to evaluate 15 flax genotypes including 10 breeding lines along with 5 local populations at two different irrigation regimes, based on70 and 140 mm evaporation from Pan, class A. This research was conducted at the Research Farm of Isfahan University of Technology and a randomized complete block design with three replications was used to evaluate the genotypes in each irrigation regime. Result of analysis of variance showed that there were significant differences among the genotypes for all of the studied traits, except for seed oil content in normal irrigation and days to maturity in limited irrigation regime. The results of combined analysis of variance showed that the irrigation regime significantly affected on all of the traits with the exception of days to 50% flowering. Also, the interaction between genotypes and irrigation regimes was significant for the traits of plant height, capsules per plant and seed yield. The phenotypic correlation coefficients showed that seed yield had significant and positive correlation with capsules per plant and 100-seed weight in the condition of limited irrigation. However, in normal irrigation, traits of branches per plant, capsules per plant and seeds per capsule highly correlated with seed yield per plot. Also, ghenetic and phenotypic coefficient of variations showed that there was genetic variation for agronomic traits among the genotypes. Moreover, broad-sense heritability was relatively high for days to 50% flowering, capsules per plant, 100-seed weight, seed yield per plant, seed yield per plot in both irrigation regimes. Therefore, it seems that selection can be effective to improve these agronomic traits and to develop drought tolerant genotypes. The results of stepwise regression indicated that in limited irrigation condition, number of capsules per plant, 100-seed weight, number of seeds per capsule and number of branches per plant significantly contributed in 95% of the variation for seed yield per plant; however, in normal conditions, all these traits except the number of branches per plant entered in the model and contributed in 96% of the variation for seed yield per plant. The results of path analysis for correlation coefficients between seed yield per plant and its components showed that in both irrigation regimes, the number of capsules per plant had the highest direct and positive effect and also indirect effects via the other yield components on seed yield per plant.