Young European Federalists (French: Jeunes Européens Fédéralistes, JEF) is a political youth organisation.

In 1967, young people held mock negotiations in Brussels to work out a treaty of accession for the UK to the European Community.

In March 1969 they organized a demonstration on the spectators benches of the European Parliament to demand its direct elections by universal suffrage.

Another major area of interest for JEF is the defence of human rights and the respect of the state of law, especially with a yearly Belarus action since 2006.

In addition to the policy objectives, the organisation tries in particular to promote European awareness among young people and encourage civic activism.

The Federal Committee is chaired by a presidium of three members and adopts the political and strategical guidelines and oversees the activity of the executive board.

It is responsible for the implementation of the external and internal policy resolutions adopted by the Congress and the Federal Committee and the management of the organisation.

Several current and former influential members of the European Parliament (MEPs), including Richard Corbett and Jo Leinen (PES), Tom Spencer (Conservative) and Monica Frassoni (Greens), and its former Secretary General Sir Julian Priestley served as JEF officers in their teens and twenties.