This study critically examines the exclusive economic zone (EEZ) delimitation and regional cooperation efforts impacting Greco-Turkish relations in the Eastern Mediterranean, focusing on their influence on both nations’ maritime security definitions. With the increasing strategic significance of maritime areas, Greek and Turkish perspectives on security are becoming ever more significant. This paper posits that the interrelations between Greece and Turkiye significantly shape their respective maritime security frameworks. Through a comprehensive review, we juxtapose the evolution of general security concepts with the specific developments in maritime security as perceived by each country. This approach reveals the profound impact of bilateral tensions on maritime security perceptions and policies. The analysis extends to the implications of these dynamics for regional stability and international maritime law, underpinning the urgent need for a collaborative and equitable approach to resolve ongoing maritime disputes. This research contributes to the broader field of international relations by highlighting the intricate relationship between historical conflicts, national security paradigms, and maritime sovereignty claims, proposing new directions for future research in regional security cooperation and conflict resolution.