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In current study, proximate compositions (ash, lipid and protein) of seven Red macroalgae (Laurencia obtusa, Liagora viscida, Liagora ceranoides, Gracilaria bursa-pastoris, Carradoriella elongata, Halopithys incurva and Tricleocarpa fragilis) collected from Turkey (Çanakkale and Antalya) were determined. The differences observed between biochemical compositions such as ash, lipid and protein of seven red macroalgae species were statistically significant (p<0.05). The lowest and highest ash, lipid and protein values of seven red macroalgae were 38.86±0.15% (Gracilaria bursa-pastoris)- 85.61±0.22% (Tricleocarpa fragilis), 0.23±0.02% (Tricleocarpa fragilis)- 1.87±0.08% (Carradoriella elongata), 2.79±0.02% (Liagora ceranoides)- 9.72±0.35% (Halopithys incurva), respectively. Gracilaria bursa-pastoris (38.86±0.15%), Carradoriella elongata (42.89±0.06%) and Halopithys incurva (42.28±0.44%) were similar each other (p>0.05). The lipid (Liagora viscida (0.44±0.07%), Liagora ceranoides (0.42±0.07%), Gracilaria bursa-pastoris (0.43±0.04%)) and protein (Tricleocarpa fragilis (2.93±0.39%), Liagora ceranoides (2.79±0.02%)) amounts of red macroalgae tested in study were similar each other (p>0.05) but the different from other red macroalgae (p<0.05). In conclusion, the information of the proximate compositions of seven red macroalgae are important for the evaluation of potential sources for commercial and human consumption. In addition, proximate compositions of tested macroalgae could make important contributions to feed formulations and functional foods in future. [ABSTRACT FROM AUTHOR]