The term "Blue Shirts", when used by itself, can refer to several organizations, mostly fascist organizations found in the 1920s and 1930s.

Politics

• The American National Blue Shirt Minutemen
• The British Fascists
• The Blueshirts, the paramilitary wing of the National Unity Party (Parti National Social Chrétien du Canada)
• The Chinese Blue Shirts Society
• A blue shirt has been worn by several socialist youth organizations since the early 1920s as a distinctive mark to symbolize their affiliation with the labour movement as blue is a common colour of workwear. These include Hashomer Hatzair, HaNoar HaOved VeHaLomed, Socialist Youth Austria, Socialist Youth of Germany – Falcons, and others.
• The Free German Youth, the official socialist youth movement of the German Democratic Republic and the Socialist Unity Party of Germany
• The French groups:
  • Mouvement Franciste
  • Solidarité Française
• The Irish Blueshirts
• National Syndicalists (Portugal)
• The Romanian Lăncieri
• The Spanish Falange; see also Blueshirts (Falange)
• The Egyptian Blue Shirts (al-Qumsan al-zarqa'), a junior movement of the Wafd Party
• The Italian Blue shirts
• National Socialist Workers' Party (Sweden)'s version of the SA had blue shirts

Sports

• The Toronto Blueshirts
• "Broadway Blueshirts" or simply "Blueshirts", a common nickname for the New York Rangers
• in American college sports, a colloquial designation for a walk-on assumed to eventually obtain a scholarship; derivative of redshirt

Other

• Les Tuniques Bleues, a Belgian comic about the American Civil War
• Derogatory term for Transportation Security Administration Agents comparing them to the Nazi Brown Shirts