This paper reviews the literature on partisan politics in Portugal at the national and sub-national levels. Starting with a description of the institutional setting, main parties and electoral results, the paper then delves into how partisanship matters for the policies implemented by incumbent governments. The available evidence indicates clear differences in several policy areas, such as the labour market, welfare, health, education, and gender issues, with Portuguese left- and right-wing governments acting in line with their ideological agendas. Voter behaviour and the emergence of the populist far-right in the Portuguese parliament are also analysed. (JEL codes: D04, D7, H4, and H7)