Glioblastomas are the primary malignant tumors of brain tissues with poor prognosis and highly invasive phenotypes. Till now Ki-67 LI has emerged as a well-studied proliferation marker that aids in tumor grading, but labeling index alone cannot predict overall survival in gliomas. P21 activated kinase 1 (PAK1)–a serine/threonine kinase has been shown to function as downstream nodule for various oncogenic signaling pathways that promote neoplastic changes. This study is designed to evaluate the expression of PAK1 across various grades and its correlation with Ki-67 LI and overall survival rates among a total number of 140 clinical brain tumors of glioma patients. We also studied the activation status of phospho PAK1 in glioma tissues and established the role of PAK1 in proliferation of glioblatoma cell lines under γ-irradiation.This study provides molecular evidence signifying the role of PAK1 and its activation status in the progression of Gliomas to more aggressive phenotypes. © 2020 Taylor & Francis Group, LLC.