{{wiktionary|red flag}} '''Red flag''' may refer to: {{TOC right}}
==Signs and warnings== * Red flag (American slavery), signal of an upcoming slave sale * Red flag warning, issued by the National Weather Service in the United States * Bloody flag, maritime flag signaling an intention to give battle with no quarter (fight to the death) * Red flag in motor racing, when conditions are too dangerous to continue the session * Red flag in gridiron football * Red flag used by a railway conductor
==Politics== * Red flag (politics), predominantly a symbol of left-wing ideologies ** Flag of the Soviet Union, known as the Red Banner * Red Flag Party, a communist party in Venezuela * Peruvian Communist Party (Marxist–Leninist), originally Peruvian Communist Party – Red Flag * Communist Organization of Spain (Red Flag) * Communist Party (Burma), or Red Flag Communist Party * Communist Party of India (Marxist–Leninist) Red Flag * Marxist-Leninist Party of India (Red Flag)
==Botany== * Red flag, a common name for ''Iris fulva'', a flowering plant endemic to the southern and central United States
==Law== * Red flag law, a state law in the US that allows temporary confiscation of firearms * Red flag traffic laws, in the UK and US in the 19th century affecting drivers of early automobiles ** "Red Flag Act", a Locomotive Act, the 19th-century British road law * Red Flags Rule, to help prevent identity theft in the US
==Arts, entertainment and media== ===Film and television=== * ''Red Flag'', a 2012 film starring Alex Karpovsky * ''Red Flag: The Ultimate Game'', a 1981 TV film starring Barry Bostwick * "Red Flag", an episode of ''Chicago Fire'' * "Red Flag", an episode of ''Jericho'' * "Red Flag", an episode of the TV documentary series ''People's Century'' * Red Flag, fictional group in ''Alphas''
===Literature=== * ''Red Flag'' (magazine), published by the Chinese Communist Party * ''Red Flag'' (newspaper), by the Trotskyist organisation Socialist Alternative in Australia * ''Shimbun Akahata'' ('Newspaper Red Flag'), of the Japanese Communist Party * ''Bandera Roja'' (La Paz), a socialist newspaper in Bolivia of the 1920s * ''Die Rote Fahne'' ('The Red Flag'), a German communist newspaper created on 9 November 1918 by Karl Liebknecht and Rosa Luxemburg
===Music=== * Red Flag (band), a synthpop band founded in 1984 * ''Red Flag'' (album), by All Saints, 2016 {{anchor|songs}} * "The Red Flag", a socialist song * "Bandiera Rossa" ('Red Flag'), a famous song of the Italian labour movement * "The Standard of Revolt" (French: ''Le drapeau rouge'' 'the red flag'), a French socialist song * "Red Flag" (song), by Billy Talent, 2006 * "Red Flags" (song), by Mimi Webb, 2023 * "Red Flags", a 2023 song by Josh Ross * "Red Flags", a 2023 song by Plain White T's * "Red Flag", a song by Slipknot from the 2019 album ''We Are Not Your Kind'' * "Red Flag", a song by Gwen Stefani from the 2016 album ''This Is What the Truth Feels Like'' * "Red Flag", a song by Kesha from the 2025 album ''Period'' * "Red Flag Day", a song by U2 from the 2017 album ''Songs of Experience'' * "Red Flags", a song by Chris Brown from the 2023 album ''11:11'' * "Red Flags", a song by Tinashe from the 2024 album ''Quantum Baby'' * "Red Flags", a song by Tom Cardy and Montaigne from the 2022 album ''Big Dumb Idiot'' * "Red Flag", a song by BiC Fizzle, BigWalkDog, and Gucci Mane from the 2022 album ''So Icy Boyz 22''
==Other uses== * Red Flag Group, a compliance risk firm in Hong Kong * Red Flag Linux, software * Red Flag Publishing House, a book publisher based in China * Exercise Red Flag, a series of United States Air Force training exercises ** Red Flag – Alaska * Red Flag, several classes of locomotives by Kim Chong-t'ae Electric Locomotive Works, in North Korea * Charles E. Taylor (politician), known as "Red Flag" Taylor, an American politician
==See also== {{srt|dab}} * Hongqi (disambiguation) (Chinese, 'Red Flag') * Jolly Roger, a pirate flag * Red Flag riots, in Brisbane, Australia 1918–19 {{disambiguation}}