Background: The adverse effects of hypertension principally involve the blood vessels, the central nervous system, the retina, the heart and the kidney, and can often be detected by simple clinical means(4). The hypertension is the most important modifiable risk factor for coronary heart disease, stroke, congestive heart failure, peripheral vascular disease and end-stage renal diseases. Aims & Objectives: To study and classify of Renal dysfunction in patients with essential hypertension Methods & Materials: The patients who visited to Medicine Department, Santosh Medical College and Hospital, Ghaziabad, with a diagnosis of Hypertension were studied considering the inclusion and exclusion criteria during a period starting from May 2014 to April 2015 from one year ( May 2014 to April 2015 ). A Case Control study with 100 patients taken as case and 25 patients as control, were studied for the renal dysfunction in essential hypertension was undertaken at Santosh Medical College and Hospital, Ghaziabad, Uttar Pradesh. Results: 36 patients (36.0%) had hypertension less than or equal to 1 year, 44 patients (44.0%) had hypertension between 1-5 years, 3 patients (3.0%) had hypertension between 6-1 years, and 17 patients (17.0%) had hypertension between 11-22 years. Conclusion: The prevalence of renal dysfunction varies in different population, based on the characteristics of the population and techniques and protocols used for evaluation. Microalbuminuria reflects a state of increased renal endothelial permeability and hence considered an early marker of diffuse endothelial dysfunction.Hypercholesterolemia, hpyertriglycemia, increased LDL all are seen in essential hypertension