This study analyzes the profile of candidates and elected officials for the position of city councilor in Brazil and its major regions, from 2004 to 2020, considering population size. Characteristics such as gender, race/color, level of education and age of candidates and elected officials in municipal elections during this period are analyzed, seeking to understand trends in the relationship between candidacies and electoral success. Using an exploratory-descriptive approach, the research is based on data from the Superior Electoral Court (Tribunal Superior Eleitoral – TSE), academic literature and demographic and socioeconomic information. The results highlight significant changes in gender representation, with an increase in the presence of women, especially in smaller municipalities from 2012 onwards. However, female underrepresentation persists in all regions. Regarding race/color, there was an increase in the participation of black candidates and elected officials in 2016 and 2020. The analysis of education shows an increase in candidates with completed secondary and higher education over time, especially in smaller municipalities. The average age of candidates and elected officials also increased gradually, with variations by population size and region.