The 2021 Portuguese Social Democratic Party leadership election was held on 27 November. If no candidate achieved more than 50% of the votes in the first round, a second round would be held between the two most voted candidates in the first round on 1 December, however, as only two candidates will be on the ballot, a second round will not be necessary. The original date for the first round was 4 December, but the party decided to advance the date by a week.