The rapid aging of the world population is major global demographic trend. The number of people with age-related disease has increased substantially due to increased life expectancy in the general population. Major geriatric urological diseases include urinary incontinence, urological cancer, bladder outlet obstruction disorders such as benign prostatic hyperplasia (BPH), sexual dysfunction, and urinary tract infection. BPH is the most common benign tumor in urology. Testosterone is considered to play a major role in the development of BPH. Lower urinary tract symptoms due to BPH are classified as related to either storage or voiding. Evaluation of symptom scores, digital rectal examination, urine analysis, serum prostate specific antigen measurement, uroflowmetry, and post-void residual urine testing are mandatory. In addition, in order to rule out prostatic cancer, other screening and diagnostic procedures are often required. Depending on the condition of the patients, approaches such as watchful waiting, pharmacotherapy with an alpha blocker or 5-alpha reductase inhibitor, or surgery such as transurethral resection of prostate are appropriate.