Objective. To investigate the predictive accuracies of the modified Glasgow Prognostic Score (mGPS), neutrophil-lymphocyte ratio (NLR), and platelet-lymphocyte ratio (PLR) as prognostic factors for patients with hypopharyngeal squamous cell carcinoma (HSCC). Study Design. Retrospective study. Setting. University hospital. Methods. The records of 106 patients who were histologically diagnosed with HSCC between January 2007 and December 2017 were reviewed. mGPS, NLR, and PLR were analyzed; univariate and multivariate analyses were performed to evaluate the prognosis of overall survival (OS). Results. The overall 5-year survival rates of patients with mGPSO, nnGPS1, and mGPS2 were 82.0%, 41.9%, and 13.5%, respectively. The overall 5-year survival rates of patients with low and high NLRs and with low and high PLRs were 83.8%, 46.2%, 57.0%, and 59.1%, respectively. mGPS (P < .001) and NLR (P <.05) were independently associated with OS, whereas PLR was not. For stage IV HSCC, only mGPS was independently associated with OS (P = .004). Conclusion. mGPS is an excellent prognostic factor for patients with HSCC.