Objective: To find out prevalence of renal stones with different chemical composition related to gender and different age groups. Study design & duration: This is a prospective study completed in duration of six months from July to August. Setting: This study was conducted in urology ward of ....... Patients & methods: Using randomized controlled trials those patients with renal stones admitted in study institution were selected for study irrespective of age, gender and geographical area from

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... ere they belong. Age range of patients in study group was 10-75 years with mean age of 33.6±7.5 years. Renal stones were collected from these cases and sent for chemical examination. Means, standard deviation and frequencies were calculated for qualitative data like age, gender and type of stone. Results: Total 1100 cases were studied including 64.8% male and 35.2% female cases. Prevalence of renal stone was higher among men than women wih male to female ratio of 1.8:1. Prevalence was higher in age group of 20-50 years among men and 30-40 years among women. Pure stones were found in 66.5% cases with calciu oxalate stones were most common (26.6%) and mixed stones were found in 33.5% cases with calcium oxalate- calcium phosphate stones more common (13.2%) among them. Conclusion: Calcium oxalate stones are most common among all types of renal stones with high prevalence among men than women in middle age groups. Key words: Renal stone, Renal calculi, Prdominant renal stone, age and gender related prevalence