Background: Urinary tract infections (UTIs) as a urological disorder occur in 1% -3% of females and 1% of males. This disease can induce severe complications such as pyelonephritis. Objectives: The current study aimed at evaluating the efficacy of vitamin C supplementation on UTI in children. Methods: The current clinical trial was conducted on 152 female children with UTI admitted to Amir-Kabir hospital, Arak, Iran. The cases were randomly divided, based on blocked groups, into two treatment and control groups of 76 patients. The subjects were matched in terms of age, gender, and clinical signs and symptoms. The control group received only routine treatment of UTI, while the treatment group, in addition to the routine treatment received oral vitamin C supplementation tablet, for a 14-day period. Results: Dysuria, urine incontinence, fever, urinary urgency, and dribbling occurred significantly earlier in vitamin C supplemented individuals than the control ones, while abdominal pain, dimercaptosuccinic acid (DMSA) scan, and recurrent UTI were not different between the two groups. Conclusions: Vitamin C supplementation can control the symptoms of urinary tract infections, including fever, dysuria, urinary urgency, and dribbling urine.