The connection between speech and cognitive impairments may be the key to understanding more general mechanisms of children's brain development. The identification, analysis, and understanding of speech impairments open up opportunities for the development of new teaching methods, rehabilitation programs, and support for children and their families in overcoming such difficulties. Particular attention should be paid to a multidisciplinary approach to the study of this issue. This approach combines the efforts of psychologists, educators, speech therapists, and medical professionals. This study aimed to investigate the neuropsychological features of cognitive functions of junior pupils with speech impairment. The research employed a comprehensive methodology based on neuropsychological tests and theoretical studies. The authors found that speech disorders among junior pupils indicate the presence of speech difficulties. Moreover, they can also be indicators of certain cognitive developmental disorders. Such peculiarities in speech and cognitive functions can lead to problems in learning, social integration, and emotional well-being. A timely detection of these features and their subsequent correction are the keys to ensuring optimal conditions for the child's development and successful societal adaptation. The main value of this study comes from the fact that it offers a holistic view of the problem. Moreover, it focuses on the broad context of influence shaping speech and cognitive development. The article is recommended for consideration by specialists in the fields of education, psychology, and medicine who are interested in expanding their knowledge and improving their practical skills in working with children with special needs.