Wagnerism may refer to:

• Composer Richard Wagner's philosophical and artistic ideals
  • Houston Stewart Chamberlain, called the "Champion of Wagnerism"
  • Wagner controversies
• Richard Wagner's style of music, for example, Alberto Franchetti
• Wagnerianism and Czech National Identity, 1870 writing by Czech historian and musicologist Otakar Hostinský
• a form of adversarial labour union legislation represented by the Wagner Act in the United States
• Wagnerism: Art and Politics in the Shadow of Music (2020), book by music critic Alex Ross