Background: A persistent metabolic syndrome is diabetes mellitus marked mostly by chronic hyperglycemia. Recently,it is considered as state of prothrombosis,characterized by abnormalities in platelet function which has been recognized as a component of the metabolic syndrome. Aims are made to discover and demonstrate the utility of various blood tests, including platelet indices for the early diagnosis of diabetic problems. Increased platelet activity has a role in development of diabetic complications, thus platelet volume indices are considered as potential biomarkers in diabetics who have vascular issues. Methods : 356 people with diabetes and 201 non-diabetics participated in the study. To perform a complete hemogram, a Sysmex KX-21 automatic blood counter and a Benesphera H51 coulter were used. From the records of the Central Clinical Laboratory, the HbA1c level was assessed using the immunoturbidometric inhibition technique. The statistical analysis was carried out using SPSS version 17 (Statistical Package for the Social Sciences) (Chicago, IL). Student's t-test was used to determine if there was a significant difference in HbA1c, PC, MPV and PDW. Statistics were judged significant at P 0.05. Results : In our study, MPV and PDW was statistically significant in diabetic patients with complications (P<0.0001 and P=0.0001respectively). A positive correlation was seen between MPV and HbA1c. While MPV was statistically significant in diabetic retinopathy, nephropathy, and diabetic foot, PDW was statistically significant in diabetic retinopathy and nephropath