Solidarity, a monthly magazine published by the United Auto Workers

Solidarity, a Polish trade union originally led by Lech Wałęsa

Solidarity, a song by the band Five Iron Frenzy

Solidarity (UK), a libertarian socialist organisation in the United Kingdom 1960-92

Solidarity Forever, an anthem of the leftist and trade-union movements

Solidarity (Scotland), a breakaway from the Scottish Socialist Party in September 2006

Solidarity is a unity of purpose or togetherness; for its use in sociology see social solidarity. Solidarity may refer to:

Solidarity (US), a United States political organization formed by the fusion of the International Socialists, Socialist Unity, and Workers' Power

Solidarity Party, an American political party founded by Adlai Stevenson III in the state of Illinois

La Solidaridad, a 19th century Filipino propagandist group

Cornish Solidarity, a cross party organisation fighting for Cornish Rights.

Solidarity (newspaper), a newspaper published by the Alliance for Workers Liberty in the United Kingdom

Solidarity (Australia), a Sydney-based socialist revolutionary outfit founded in 2003

Solidarity (Ukraine), a political party in Ukraine

Solidarity - Kosovo is Serbia, a Serbian media campaign

Solidarity – The Union for British Workers, a UK "trade union" linked to the British National Party