Background and aims:Familial hypercholesterolemia (FH) is an autosomal dominant genetic disorder of lipid metabolism which leads to premature cardiovascular diseases. In patients with FH, blood inflammatory markers may be disrupted; however, its extent is unclear. In this study we aimed to evaluate, the NLR: Neutrophil to lymphocyte ratio, PLR: Platelet count to lymphocyte count ratio, MPV: Mean platelet volume, RPR: Red blood cell distribution width to platelet count ratio, WBC: White blood cell, PDW: Platelet distribution width and platelets count. Methods:The study group consisted of 331 patients with FH and 260 control patients. Controls had a history of hyperlipidemia and both groups could be on pharmacotherapy or not. Results:None of the CBC inflammatory markers were not significantly difference in patients with FH than non-FH. Platelet count was significantly higher among patients with FH when compared to control patients (240.43±54.15 vs 228.52±47.37 p= 0.049*). When we used linear regression analysis, only RLR was independently associated with total cholesterol (b=0.000, p=0.13). Here we showed that CBC markers are nor different between FH and non-FH patients, however PLR is associated with cholesterol level not FH. Conclusions:Our results may show the important of high cholesterol on platelets activity and highlight the use of lipid lowering drugs in patients with hyperlipidemia.