Background The purpose of this study was to assess swallowing outcomes in a cohort of patients with oropharyngeal squamous cell carcinoma (SCC) undergoing nonoperative treatment. Methods We conducted a retrospective study of patients who completed videofluoroscopic swallowing studies (VFSS) after nonoperative treatment of oropharyngeal SCC. All patients received intensity‐modulated radiation therapy (IMRT) ± chemotherapy. Swallowing abnormalities were recorded and the Penetration Aspiration Scale (PAS) quantified airway infiltration. Results Posttreatment VFSS (n = 71) occurred at an average of 4.69 months posttreatment. Abnormal PAS was noted in 45% of swallow studies. Swallowing decompensations included reduced pharyngeal constriction (75%), epiglottic tilt (70%), cricopharyngeal opening (42%), and hyoid excursion (42%). The only variable independently associated with abnormal PAS was pretreatment swallowing difficulty (odds ratio OR = 4.02; p = .009). Conclusion This study demonstrates that patients undergoing nonsurgical treatment for oropharyngeal SCC are at risk for posttreatment dysphagia. This suggests a need for dysphagia evaluation/management and refinement of interventions to minimize dysphagia. © 2014 Wiley Periodicals, Inc. Head Neck, 36: 1392–1397, 2014