This article analyzes South Korea’s new National Security Strategy (NSS) released in June 2023 under President Yoon Suk-yeol. The study situates the NSS in the context of rapidly changing regional and global geopolitics, examining the factors driving the emergence of this new strategy. The article primarily uses secondary document analysis methods to identify the content of the NSS; the research clarifies significant changes in South Korea’s approach to national, regional, and global security issues. The research results not only provide insights into South Korea’s national security strategy but also contribute to a better understanding of the geopolitical dynamics reshaping the regional order.