The purpose of the study is to explain the difference in the proportion of women deputies in the representative bodies of different municipalities. The author assesses the impact of the electoral districts size on the gender composition of municipal legislative bodies (dumas). A review of theoretical and empirical works shows that more women are elected to Parliament under the proportional representation system than under the majority system with single-mandate constituencies. According to the author, the decisive factor is not the type of the electoral system, but the size of the electoral district. Two working hypotheses were formulated. According to the first, representative bodies of municipalities, whose elections are held according to a majority system with multi-member districts, will have a higher representation of women than local dumas which are formed on the basis of a majority system with single-member districts. According to the second hypothesis, higher representation of women in the deputy corps of settlements can be associated with the holding of elections under the majority system with multi-mandate districts. To test the proposed hypotheses in the context of municipalities, empirical material was collected. The study was carried out on the data from the Sverdlovsk region. The database of indicators of municipalities of Rosstat, as well as the official websites of local administrations were used as the source of information. The method of multiple linear regression is used as the main research method. The data was analyzed with the Gretl applied statistical program. Statistical calculations have revealed a positive and statistically significant impact of multi-mandate constituencies-based elections on the proportion of women in the deputy corps, which contributes to the study of gender aspects of politics. It is shown that the size of the electoral district is important for the representation of women in the city councils. The article notes that the transition to holding elections of deputies on the basis of a majority system with multi-mandate districts will help increase the proportion of women in municipal representative bodies.