The chapter attempts at bringing out an overview of linguistic-based deficits in neurodevelopmental disordered (NDD) population. Clinical linguistics as a discipline has provided a different dimension to view each patient as a distinctive case and has brought out the utilization of comprehensive depiction of individual skill patterns and deficits. As the NDDs are heterogeneous in nature, understanding their language deficits using achievement tests might not provide a clear description of these disorders. Hence, controlled experimental investigations using varied methodological designs could help in tapping their common linguistic variations which may augment key professionals to better identify, assess, and rehabilitate these individuals. While appreciating all these factors, the chapter provides first-hand information on some of the neuro-developmental disorders and also the language-based diagnostic markers to identify them.