© 2019 The American Laryngological, Rhinological and Otological Society, Inc. Objectives/Hypothesis: The objectives of this study were to examine patient outcomes using a 36-month age cutoff as a strict admission criterion following tonsillectomy, and review the safety and determine the plausibility of same-day discharge of children under 3 years old following tonsillectomy. Study Design: Retrospective chart review. Methods: A chart review of patients aged 24 to 42 months undergoing tonsillectomy over a 3-year period was conducted. Patients were stratified into <36 months and ≥ 36 months cohorts. Data collected included demographics, medical/sleep history, inpatient records, 30-day emergency department visits, and readmission data. Bivariate comparisons were made using χ2 and Wilcoxon tests for categorical and continuous variables. Results: Between July 2014 and July 2017, 427 patients aged 24 to 42 months underwent tonsillectomy at our institution. Thirty-day emergency department visit, readmission, and greater-than-expected length of stay rates were 3.0% versus 3.7% (P =.75), 1.0 versus 1.8% (P =.61), and 4.7% versus 4.5% (P = 1.00) between the younger and older cohorts, respectively, with no difference in complication rates identified based on age. Conclusions: No significant difference in adverse outcomes was appreciated based on a cutoff of 36 months of age at a tertiary center over 3 years. There should continue to be ongoing studies addressing strict age-related admission criteria. Level of Evidence: 4 Laryngoscope, 129:E389–E394, 2019.