Hypertensive disorders complicate 5%10% of all pregnancies and together they form one member of the deadly triadHypertension, Haemorrhage and Infection Preeclamsia is a syndrome charecterised by hypertention and proteinuria developing after 20 weeks of gestation in a woman with previously normal blood pressure contribute greatly to the fetal morbidity and mortality rates. Aims and Objectives: To evaluate the relationship between platelet count and platelet indices in mild and severe preeclampsia patients. Material and Methods: The study was carried out in the Department of Pathology, ESICMC PGIMSR, Bangalore for one year duration prospectively. The cases which were clinically diagnosed as mild and severe grade of preeclampsia amounting to sixty seven were used for the study. Out of 67, 59 cases were of mild grade and 8 cases were of severe PIH. The statistical analysis was done with mean, standard deviation, oneway ANOVA. Results: There was a significant correlation between increase in platelet count with that of PDW and PLCR with p value of <0.001. Conclusion: Platelet count and Platelet indices will be very much helpful to the physician to make a detailed review and to prevent maternal and fetal morbidity and mortality in PIH.