ImportanceTonsillectomy is one of the most common surgical procedures performed in the United States. However, there is little known about the intersectionality of race, ethnicity, and language and how these factors influence post-tonsillectomy outcomes such as ED utilization and hospital readmission rates. ObjectiveTo examine disparities in emergency department (ED) utilization and hospital readmissions for post-tonsillectomy complications based on insurance status, patient race, ethnicity and language spoken. DesignThis was retrospective cohort over four years. SettingTertiary Care Children's Hospital. ParticipantsAll children (n = 10,215) who underwent tonsillectomy or adenotonsillectomy at a tertiary children's hospital from January 2015 to December 2018 were identified and included. There were no exclusion criteria. ExposureThe exposure of interest was tonsillectomy. Main outcomes and measuresOutcomes and variables of interest were defined prior to data collection. The primary outcome of this study was emergency department (ED) utilization defined as any ED or urgent care visit within 21 days of the tonsillectomy for surgery-related concerns. The secondary outcome of this study was readmissions following tonsillectomy. ResultsA total of 10215 pediatric patients (median age, 6 years; 5096 [50 %] male) who underwent tonsillectomy were included in the analysis. 13 % of patients presented to the ED with surgery-related complaints. Among English proficient patients, multi-racial patients were the only group with an elevated odds of ED utilization (OR:1.5, 95 % CI: 1.2, 1.9). Non-English language preference (NELP) patients of Black, Hispanic, Asian, and American Indian/Alaskan Native race/ethnicity also had elevated odds of ED use post-tonsillectomy compared to non-Hispanic White English proficient patients. Six percent of all patients had an unplanned hospital readmission. Asian patients with non-English language preference had 2.1 times the odds of readmission (95 % CI: 1.2, 3.6); and were disproportionately admitted for post-tonsillectomy hemorrhage. Conclusionsand Relevance: Language disparities in ED use and readmission persist after adjusting for risk factors. Non-English language preference populations have a higher rate of ED utilization, especially for minor complications. Disparities may result from differential health literacy or predispositions to complications. Future directions include additional research on mechanisms and targeted interventions to increase education and access to language-appropriate resources.