The present study was conducted as a pot experiment to evaluate the effects of different levels of pumice (0, 10, and 20% v/v of soil) and irrigation water salinity (low and high) on yield and water productivity of maize (cv. Maxima). The experiment was arranged as a factorial in a randomized complete block design with three replications in a greenhouse in Mahneshan, Zanjan-Iran. During the growing period, irrigation water was supplied from Mahneshan’s municipal water (low salinity) and Qezel-Ozan River (high salinity). The results showed that the highest mean plant height, stem diameter, leaf area, fresh yield, and water physical productivity (220cm, 2.7cm, 6233.1cm², 513. 3g plant⁻¹, and 8.1Kg m⁻³, respectively) were obtained in 10% pumice-low salinity treatment which compared with the control (0% pumice-low salinity), these values increased by 4.4%, 12.5%, 7.9%, 28.3%, and 28.3%, respectively. The lowest mean plant height, stem diameter, leaf area, fresh yield, and water productivity (151.7cm, 2.0cm, 3989.5cm², 286.7g plant⁻¹, and 4.5Kg L⁻³, respectively) were observed in 20% pumice-high salinity treatment, which represented decreases of 28.0%, 16.7%, 31.0%, 28.3%, and 28.3%, respectively, compared with the control. Overall, the findings indicated in low-salinity irrigation water, increasing the pumice content from 10% to 20% reduced the mean plant traits and water productivity. Moreover, in high salinity water conditions, the addition of pumice at different levels led to reductions in plant growth characteristics and water productivity.