Dublin Bay South has been called "one of the most liberal constituencies in the country" as well as "one of the wealthiest". It had the highest vote in the 2018 referendum to repeal the Eighth Amendment of the Constitution, which prohibited abortion, and its main predecessor constituency Dublin South-East had the highest vote in favour of marriage equality in the 2015 referendum with 74.0% voting 'Yes'. It has been noted that between the Labour Party, the Green Party, the Social Democrats and Democratic Left, centre-left parties have won at least 29% of the vote in every election in the area between 1981 and 2021.