BackgroundData on postoperative outcomes of the COVID-19 patient population is limited. We described COVID-19 patients who undergone a surgery and the pandemic impact on surgical activities.MethodsWe conducted a multicenter cohort study between March 13 and June 19 2020. We included COVID-19 patients who underwent surgery in nine centres of the Province of Québec, the Canadian province most afflicted by the pandemic. We also included suspected COVID-19 (subsequently confirmed not to have COVID-19) patients and patients who had recovered from it. We collected data on baseline characteristics, postoperative complications and overall surgical activities performed in participating centres. Our primary outcome was 30-day mortality. ResultsWe included 44 COVID-19 patients, 18 suspected patients, and 18 patients who had recovered from COVID-19 at time of surgery. Among the 44 COVID-19 patients, 31 surgeries (71%) were urgent and 16 (36%) were major. In these patients, pulmonary complications were frequent (25%) and 30-day mortality was 15.9%. This mortality was higher in patients with symptoms (23.1%) compared to those without symptoms (5.6%), although not statistically significant (p = 0.118). Of the total 22 616 cases performed among participating centres during the study period, only 0.19% had COVID-19 at the time of surgery. Fewer procedures were performed during the study period compared to the same period in 2019 (44 486 cases).Conclusion In this study, postoperative 30-day mortality in COVID-19 patients undergoing surgery was 15.9%. Although few surgeries were performed on COVID-19 patients, the pandemic impact on surgical activity volume was important. Trial registrationClinicalTrials.gov Identifier: NCT04458337