Background: Endoscopy is a minimally invasive diagnostic tool useful in medical practice and also in the field of Orthorhinolaryngology to visualize the interior surfaces of a tissue or organ that are not usually seen when performing a standard examination of the larynx and surrounding structures. This serves both a diagnostic and therapeutic purpose. Aims and Objectives: (i) To ascertain the number of videolaryngoscopy and nasal endoscopy carried out in the ORL Outpatient Clinic of the Lagos State University Teaching Hospital. (ii) To identify the commonest diagnosis made after both procedures Patients and Method: This was a 1 year retrospective study (March 2020 to March 2021) at the Outpatient Clinic of the Lagos State University Teaching Hospital, Ikeja, Lagos, Nigeria. 219 patients had either a nasal endoscopy or videolaryngoscopy within the study period. Data collected included the bio data, symptoms, procedure done and diagnosis post procedure. Data was analyzed using SPSS. Result: 219 patients underwent endoscopies in the ENT Outpatient Clinic of the Lagos State University Teaching Hospital within the study duration. The study population was made up of 73 males and 146 females with a Male: female ratio of 1:2. Age range was 11 to 80 years. 143 patients had Video laryngoscopy, 73 Nasal endoscopy were done while 3 patients had both procedures done. The commonest symptoms for patients that had a nasal endocopy were nasal blockage and nasal discharge with a frequency of 31.58% and 28.95% respectively with Chronic rhionsinusitis, Nasal polyposis and Nasopharyngeal tumor being the common diagnosis made with a percentage of 43.8%, 15.73% and 13.48% respectively. Pre-operative assessment of patients for thyroidectomy was the commonest indication for videolaryngoscopy (35.29%) followed by hoarsensess/voice change (24.51%). Vocal cord paralysis (28.97%), Chronic pharyngitis (19.63%) and chronic laryngitis (11.21%) were the common diagnosis made after the procedure. Conclusion: Nasal endoscopy and Video laryngoscopy remains an essential diagnostic tool in ORL practice and its use cannot be over emphasized.