Background. The purpose of this study was to (1) determine the incidence of postoperative urinary retention (POUR) in patients undergoing lung resection at our institution, (2) identify differences in potential risk factors between patients with and without POUR, and (3) describe patient outcomes across POUR status.Methods. The medical records of 225 patients between 2016 and 2017 were reviewed, and 191 met criteria for inclusion. The institution's catheterization removal protocol was followed in all patients. Recatheterization was defined as requiring in-and-out catheterization or Foley catheter placement. Fisher exact and Wilcoxon tests were used for analysis.Results. POUR developed in 35 patients (18%). Patients with POUR were older (P [ .01), had increased baseline creatinine (P [ .04), and a higher prevalence of benign prostatic hyperplasia (P [ .007). POUR patients were also less likely to get a Foley catheter