Young European Socialists (YES) is the youth organisation of the S&D Group and the PES. It unites young socialists and social democrats from all over Europe to campaign and organise at the European level.

YES provides a forum for debate, advocacy, capacity building and exchange for all European young socialist activists. Their vision for Europe is a united democratic community based on, and globally active for, individual and collective human rights and freedoms. One example of a joint activity is the Winter University, which takes place every year at the European Parliament and consists of a series of conferences and workshops with members of the European Parliament from the S&D Group.