Aim: The relationship between obesity and urinary tract infections (UTI) was reported in adult studies, but pediatric data is lacking. Methods: This prospective study included children, who were admitted to the outpatient clinic only with the complaint of obesity. UTI screening with symptomatic questioning and clinical feature was performed. Symptomatic participants were examined(urinalysis, culture, or/and blood work, imaging tests). Characteristics of those with UTI, and we determined an obese/overweight, but non-UTI control group matched with age and gender and conducted a case-control study. Results: In this study, 1001 participants were screened, UTI frequency was 3,39%, with 91,2% female predominance. The mean age of all participants was 11.44±3.21 years. All of the UTIs were lower tract infections. Escherichia coli(82,4%) was the most frequently isolated microorganism. History of UTI and hypertension was more frequent in the UTI group(n=34) compared with non UTI group (n=136)(p=0,001; p=0,001). Conclusion: In the UTI group, hypertension and previous UTI history were shown to be more common, so it may be important to question obese/overweight children for UTI at their clinical application.