Urinary tract infections (UTI) and increasing antimicrobial resistance of uropathogens in recent years are major health problems in childhood. Early, suitable, empirical antibiotic treatment decreases the rate of morbidity. In our study we aimed to determine the distribution and antimicrobial resistance patterns of bacterial strains isolated from pediatric patients with community-acquired UTI. The urine cultures of the outpatients admitted to the Department of Pediatrics were analysed in Zonguldak Karaelmas University, Faculty of Medicine between January 2004 and March 2007. The most frequently isolated microorganism was Escherichia coli (63.3%), followed by Klebsiella spp. (15.2%) and Enterococcus spp. (7.4%). Resistance to antimicrobials were analysed in three age groups: Group I, >= 12 months; group II, 13-60 months, group III, >60 months. Among E. coli and Klebsiella spp. isolates, resistance rates to ampicillin, trimetoprim/sulfamethoxazole and amoxicillin/clavulanate were significantly high in all groups. Amikacin was one of the most active agent against E. coli (3.4% resistant isolates) and Klebsiella spp (5.7% resistant isolates) in all isolates. Among E. coli isolates, resistance rates to cefuroxime (9.6%) and nitrofurantoin (5.5%) were lower than Klebsiella isolates (42.8% and 31.4%, respectively) in all groups.