This article employs a comprehensive set of data on 226 regional legislative elections held in Russia in 1999-2011 in order to assess the impact of electoral authoritarianism upon women's representation in sub-national legislative bodies. The analysis of 50,520 cases of candidate nomination and 9553 cases of electoral success, supported by a cross-regional statistical study of the factors of women's nomination and success, empirically confirms an explanatory model that incorporates three working hypotheses derived from the mainstream literature on women's representation. According to this model, the 2002-2003 electoral reform, by introducing proportional representation into regional electoral systems, strongly facilitated women's representation. After the advent of electoral authoritarianism, proportional rules, in combination with the increased party magnitude' of the pro-government party, continued to exert expectedly positive effects; yet these effects were offset by the decreased competitiveness in majority districts. As a result, political regime transformation did not lead to a significant increase in the number of female deputies.