<b><i>Objective:</i></b> To compare the surgical outcomes and clinical improvement 1 year after laparoscopic partial and total adrenalectomy for the treatment of patients with nonhereditary unilateral functional adrenal adenomas. <b><i>Material and Methods:</i></b> From March 2016 to January 2018, we performed 15 laparoscopic partial adrenalectomy (LPA; Group 1) and 25 laparoscopic total adrenalectomy (LTA; Group 2) procedures. The key points reside in adenoma identification, preservation of the remaining glandular parenchyma, and its blood supply with dissection in the space between the adenoma and the normal parenchyma. The operative and clinical outcomes were compered. <b><i>Results:</i></b> The mean age of the patients was 45.1 (17–69) years and the median follow-up was 15 (12–26) months. Operative time, blood loss, and hospital stay were similar between the groups. No major perioperative and postoperative complications occurred. After surgery, all patients had resolution of their symptoms, with no patient in Group 1 requiring steroid replacement. However, a patient in Group 2 required steroid replacement therapy. On postoperative imaging, no residual and recurrent mass was detected. <b><i>Conclusions:</i></b> Our results showed that LPA is safe and feasible, and has similar therapeutic results compared with LTA in patients with a nonhereditary hormonally active unilateral adrenal mass. Furthermore, LPA can obviate the need for steroid replacement in these patients.