The research aimed to measure the impact of food sovereignty of grain crops on water consumption in the agricultural sector during the period 1990-2020. This study resulted in a set of results, the most important of which is, the total amount of water used in the production of grains amounted to 136.32 billion m3, representing 27.0% of the total amount of water used in the agricultural sector during the period 1990- 2020. Increases of 10% in the ratio of grain area to area yield and the summer grain area to its winter counterpart resulted in increases of 10.7% and 3.66 % in the amount of water utilized in grain production, respectively. Furthermore, a 10% increase in the expected amount of water required in grain production results in a 2.8 % increase in the water used in agriculture. In light of the scarcity of water resources, expanding the cultivation of the most significant winter cereal crops (wheat) while reducing the area of summer cereal crops with high water requirements, the most important of which is sorghum, is required to reduce water use.