Aquatic ecosystems and algae, which are the primary producers living in these areas, are the subject of many studies due to their importance. Macroalgae are indicator organisms in terms of showing the elemental composition of the region they live in. In this study, elemental analyzes of macroalgae belonging to Cystoseira foeniculacea and Gongolaria montagnei were carried out, that species collected from the coastal region of Antalya Province Serik District, which has a coast to the Mediterranean and Pearson Correlation Index (PCI) was applied to show the relationships between the results. The obtained data were compared with other studies. About macro elements, the highest value was determined as K element and the lowest value was determined as P element in Cystoseira foeniculacea and Gongolaria montagnei species. About trace elements, for Cystoseira foeniculacea species the highest value as Fe element and the lowest value as Mo element, for Gongolaria montagnei species the highest value as Fe element, and the lowest value as Cd element, were determined. According to the Pearson Correlation Index analysis, positive and negative relationships were determined between the elements. When the data obtained in our study were compared with the data of other previous studies, it was determined that the results were similar to each other.