The study aimed to benefit from strategic planning in achieving knowledge management, as knowledge management has become one of the requirements of the rapidly changing modern era. To achieve this, the researcher tried to find the relationship between strategic planning and knowledge management in public education schools in Jizan, and to know the reality of achieving strategic planning and the extent to which knowledge management is achieved in the schools surveyed. The descriptive approach was used to achieve the objectives of the study, and the questionnaire was used as a tool to identify the point of view of the study sample (deputy principal of public education schools in Jazan), where the sample reached 259 individuals from the study population of 798. The results showed that the reality of the application of public education schools in Jazan for strategic planning was very high, according to the point of view of the study sample, and that knowledge management is achieved in those schools to a high degree. The results also proved that there is a statistically significant positive relationship between strategic planning and knowledge management, and therefore strategic planning can be used to achieve knowledge management. The study concluded with a number of recommendations, the most prominent of which was the need to pay attention to schools in executive or operational plans that contribute to achieving strategic plans along with considering the importance of the schools' strategic plans emanating from the plan of the Ministry of Public Education to achieve its goal.