Abstract This scientific article examines the system of electoral districting in the 2023 Sejm elections and its impact on the principle of equality of representation. The main objectives of the study are to analyse the relationship between the principle of equality of representation and electoral districting in Sejm elections, evaluate the compliance of current constituency boundaries with this principle, and assess the potential consequences of any changes in districting in the 2023 Sejm elections in terms of electoral representation. The research questions guiding this study are as follows: (1) How should constituencies be determined for the 2023 Sejm elections and what legal criteria should be applied in electoral districting? (2) Does the current districting system align with the principle of equality of representation? (3) Are there disparities in the size or demographics of constituencies that could result in unequal representation in the Sejm? (4) What are the potential implications of the current districting system for the representation of different political parties? (5) How do alternative scenarios of districting affect the principle of equality of representation in the context of the 2023 Sejm elections? The research employs an institutional-legal analysis, along with statistical data analysis and simulations, to model alternative districting scenario and evaluate their effects on the principle of equality of representation. The findings of this study contribute to a comprehensive understanding of the implications of districting on the principle of equality of representation in the 2023 Sejm elections. The research emphasises the significance of fair districting for ensuring equal representation and provides valuable recommendations for policymakers.