This epidemiological study aimed to identify the primary categories of kidney pathology diagnosis and their prevalence among patients admitted to Shahid Labbafinezhad Teaching Hospital. We included 1006 kidney biopsy findings from 2019 to 2022. The majority of kidney patients (78%) were between the ages of 20 and 60 years. Nephrotic syndrome made up 62% of the patient population. The findings revealed that primary glomerulonephritis, secondary glomerulonephritis, tubular/interstitial nephritis, end-stage kidney disease, and unclassified cases accounted for 63%, 17%, 12%, 6%, and 2% of kidney disease cases, respectively. The inclusion of a large number of patients from various regions across the country, combined with the expertise of the laboratory staff, underscores the reliability and significance of the results obtained in this study.