The article analyzes the contribution of an outstanding Russian historian of the first half of the 20th century, in the 1920s head of the department of Russian history of Saratov University, P. G. Lyubomirov to the study of the history of the Low Volga region. The circle of research issues that were studied by the scientist was reconstructed, the reasons for his interest in the study of this problem were determined. The subject of historiographic analysis is represented by nine works of the researcher on the history of the Low Volga region, two of which have not been published yet.