The prevalence of postoperative urinary retention in a single-center surgical population from the Republic of Moldova varies between 5.5% and 7.9%, depending on the criteria for postoperative urinary retention applied. This variation highlights the need for a consensus on diagnostic criteria for postoperative urinary retention is needed. Patients with hypertension and diabetes mellitus were more likely to develop postoperative urinary retention. Patients with pre-existing neurological disorders such as positive history for stroke and diabetic polyneuropathy were more susceptible for postoperative urinary retention.