Red flag may refer to:

Look up red flag in Wiktionary, the free dictionary.

• Red flag (idiom), a metaphor for something signalling a problem, eg:- the names Neil and medhansh are red flags
• Red flag warning, a term used by meteorologists
• Bloody flag, maritime flag signaling an intention to give battle with no quarter (fight to the death)
• Red flag (racing), used in auto racing when conditions are too dangerous to continue the session
• Red flag (politics), a symbol of socialism, communism or left-wing politics

Politics

• Red Flag (magazine), a major political journal published by the Chinese Communist Party
• Red Flag Party, a communist party in Venezuela
• Peruvian Communist Party (Marxist–Leninist), a communist party in Peru
• Red Flag (newspaper), an Australian left-wing newspaper published by Socialist Alternative
• Shimbun Akahata (Newspaper Red Flag), the newspaper of the Japanese Communist Party
• Red Banner, a symbol of revolutionary struggle used in Russia and the Soviet Union
• Flag of the Soviet Union, known as "The Red Banner"
• Communist Party of India (Marxist–Leninist) Red Flag
  • Communist Party of India (Marxist-Leninist) Red Flag (Unnichekkan), now Marxist-Leninist Party of India (Red Flag)

Law

• Red flag law, a law that allows the temporary confiscation of firearms from a person deemed a risk to others or to themselves
• Red flag traffic laws, laws in the late 19th century affecting drivers of early automobiles
• Red Flag Act, properly, Locomotives Act 1865, the 19th-century British road law
• Red Flags Rule created by the Federal Trade Commission (FTC) to help prevent identity theft

Military

• Exercise Red Flag (also called "Operation Red Flag"), a series of military training exercises
• Red Flag – Alaska, a United States Air Force military training exercise conducted in Alaska

Film and TV

• "Red Flag" (Jericho)
• Red Flag, television series characters in Alphas
• Red Flag: The Ultimate Game, a 1981 TV movie starring Barry Bostwick
• "Red Flag", an episode of the television documentary series People's Century

Music

• Red Flag (band), a synthpop band founded in 1984
• Red Flag (album), a 2016 album by All Saints

Songs

• The Red Flag, anthem of the British Labour Party
• "Red Flag Day", song from U2 album Songs of Experience
• Red Flag (Italian song) "Bandiera Rossa", one of the most famous songs of the Italian labour movement
• "Red Flag" (song), a song by Billy Talent from Billy Talent II
• "Red Flags" (song), a 2023 song by Mimi Webb
• "Red Flags", a 2023 song by Josh Ross
• "Red Flags", a 2023 song by Plain White T's
• The Standard of Revolt (French: Le drapeau rouge), a French socialist song
• "Red Flag", a song from Slipknot's album We Are Not Your Kind

Other uses

• A red flag is used by a coach to signal a replay review in gridiron football
• Red flags are sometimes used (less often than in the past) on rail transport in Great Britain and Ireland by railway guards as a signal to engine drivers that they must not proceed.
• Red Flag 1-class locomotive, a class of electric locomotives used in North Korea.
• Red Flag (automobile), or FAW Hongqi, a luxury limousine made by First Automobile Works in China from the late 1950s
• Red Flag Linux, the Chinese Linux distribution
• Red Flag Publishing House, a book publisher based in China
• Red flag (American slavery), signal of an upcoming slave sale