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Macrophytes are essential components of the aquatic ecosystem that occur in all water bodies of all climate zone and they possess characteristic features that allow them to thrive in such environment. This study aimed to investigate the physiochemical-water quality parameters and diversity of the aquatic macrophytes present in Goenyeli Dam, Nicosia district, North Cyprus. This research carried out within a period of three months showed a seasonal variation in the physiochemical parameters of the water. Water samples were collected from multiple locations within the dam and analyzed for pH, temperature, dissolved oxygen, turbidity, and nutrient levels. Additionally, macrophyte samples were collected and identified using morphological characteristics. The presence of nutrient and dissolved oxygen played a crucial role in the species diversity and the physiochemical parameters of Goenyeli Dam fall under normal range which shows good water quality that supports the growth of aquatic macrophytes. The study revealed a mean pH of 7.47 in January, temperature of 26.0 C in February and March, dissolved oxygen of 4.7 mg/L in January, turbidity of 100% through the different periods. A total of 12 macrophytes species from 6 families were identified, with Ruppia cirrhosa being most prevalent. These findings provide valuable information on the current state of the Goenyeli Dam and can be used to inform management and conservation efforts in the future. The study also contributes to knowledge in the field of water quality and aquatic macrophytes