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Introduction: Urinary tract infections (Uti) are one of the most common infections that affec thumans throughout their lives and are a common healthproblem both at the community and at the nosocomial level. Knowing microbiological characteristics, sensitivity profile and risk factors allow to optimize the management of Utis minimizing the increase of antibiotic resistance (AR) and establishing early treatments to reduce the morbidity and severity of infection. This study aims to establish which microorganisms are responsible for urinary tract infections in our community and determine their AR., Patients and Methods: An observational, descriptive, cross-sectional, retrospective study of all patients with the first episode of UTI recorded at the Sanatorio Allende in the city of Cordoba, Argentina, who were requested to under go urine culture (URC), from January 2016 to December 2017., Results: 3636 positive URC were analyzed, of which1740 met the inclusion criteria. Of the total analyzed 90.2 % (n=1570) were female. The average age was 37.8 years (SD=15.2). Escherichia coli was the microorganism most frequently isolated in 80.3% followed by S. saprophyticus in 8.0%. The age group of 18-30 years (40.1%) showed the highest proportion of microorganisms, where we observed the highest prevalence of E. coli and S. saprophyticus. The following acquired resistances were obtained from the total isolations: 47.6% of the microorganisms were resistant to ampicillin, 29.6% to cotrimoxazole, 15.2% to ciprofloxacin, 4.6% to first generation of cephalosporins, 3.4% to cefixime, 2.3% to amoxicillin-clavulanic, 1,2% to gentamicin and 1% to nitrofurantoin., Conclusion: E. Coli was the most prevalent pathogenin our environment, with high rates of resistance to ampicillin, fluoroquinolones and trimethoprim-sulfamethoxazole, confirming the need for periodic studiesto determine the most optimal empirical antibiotic treatment.