The 2020 Portuguese Social Democratic Party leadership election was held on 11 and 18 January 2020. As no candidate received a majority of all valid votes on the first round, held on 11 January 2020, a second round took place one week later, 18 January, between the two candidates with the highest number of votes in the first round. This was the first time that a Social Democratic Party leadership election was contested on a second ballot.