Abstract: Primary Health Care (PHC) is universally recognized as the foundational element of a robust, equitable, and efficient health system, essential for achieving universal health coverage and optimal health outcomes for entire populations. As the pivotal frontline providers in this system, Community Health Nurses (CHNs) function as clinicians, educators, advocates, and coordinators, directly engaging with diverse communities to deliver comprehensive care. This article provides a detailed examination of the multifaceted role of CHNs in translating the core principles of PHC—accessibility, health promotion, disease prevention, community participation, and intersectoral collaboration—into tangible action. It critically analyses how CHNs effectively bridge the critical gap between clinical services and public health, with a dedicated focus on addressing the social determinants of health to mitigate pervasive disparities. The discussion encompasses a review of key intervention strategies, including targeted health education, large-scale immunization campaigns, maternal-child health programs, chronic disease management initiatives, and therapeutic home visits. Significant challenges such as workforce shortages, resource limitations, and complex socio-political barriers are thoroughly scrutinized. Furthermore, the article explores innovative, community-driven care models and concludes with evidence-based recommendations designed to empower CHNs, expand their scope of practice, and ultimately fortify PHC systems on a global scale. The central thesis asserts that strategic investment in and unwavering support for the community health nursing workforce is an imperative, not merely an option, for constructing resilient, responsive, and genuinely person-centered health systems.