Antifa may refer to:

• Anti-fascism, history of fascism's opposition before and during WWII
• Post–World War II anti-fascism, including antifa groups
  • Antifa (Germany), a far-left political movement in Germany
  • Antifa (United States), a movement of left-wing American activist groups
  • Antifa (Israel), a movement of left-wing Israeli activist groups

• Antifaschistische Aktion ('Anti-Fascist Action'), German group active in 1932–1933
• Anti-Fascist Action, a British group active 1985–2001
• Antifascistisk Aktion, a Swedish group active since 1993

• Antifa: The Anti-Fascist Handbook, a 2017 book by historian Mark Bray

• Rosa Antifa, a group in Vienna, Austria active since 1995
• Rose City Antifa, an American group in Portland, Oregon, active since 2007
• All pages with titles containing Antifa