Fast or FAST may refer to:

• "Fast" (Juice Wrld song), 2019
• "Fast" (Luke Bryan song), 2016
• "Fast" (Sueco song), 2019
• "Fast" (GloToven song), 2019
• Fast, an album by Custom, 2002
• Fast, a 2010 short film starring Charlyne Yi
• "Fast (Motion)", 2021 song by Saweetie
• Fast & Furious, an action franchise
• "Fast" (Demi Lovato song), 2025

• Farpoint Asteroid Search Team, an asteroid search team located at the Farpoint Observatory
• Fast Auroral Snapshot Explorer, one in the series of NASA's Small Explorer spacecraft
• Five-hundred-meter Aperture Spherical Telescope (五百米口径球面射电望远镜), a large single-dish radio telescope in Guizhou province, China

• to fast, to abstain from eating food with or not with concurrent abstention from drinking for a predetermined time period
• Fluorescence-activating and absorption-shifting tag, genetically encoded protein tag used in molecular biology

• FAST protocol, an adaptation of the FIX protocol, optimized for streaming
• FAST TCP, a TCP congestion avoidance algorithm
• Facilitated Application Specification Techniques, a team-oriented approach for requirement gathering
• Fatigue Avoidance Scheduling Tool, software to develop work schedules
• Features from accelerated segment test, computer vision method for corner detection
• Feedback arc set in Tournaments, a computational problem in graph theory
• Fast (video game series), a video game series for Nintendo consoles developed by Shin'en Multimedia

• Future Attribute Screening Technology, a method of detection based on the correlation of bodily signals indicating the probability of intent to commit a future crime

• Fast food, restaurant or cafeteria food types which have an order to service or delivery to the customer principle of least time possible

• Faʻatuatua i le Atua Samoa ua Tasi (FAST), a political party in Samoa
• Fixing America's Surface Transportation Act, passed by the United States Congress
• Foreign-Deployed Advisory and Support Teams, a former program of the US Drug Enforcement Administration; see Drug Enforcement Administration § Special Response Teams
• Free and Secure Trade, a Canada-United States and Mexico-United States program to facilitate faster cross border trade

• Fleet Antiterrorism Security Team, a unit of the United States Marine Corps
• Fuel And Sensor Tactical packs, a type of conformal fuel tank developed for the F-15
• Future Assault Shell Technology helmet, an American combat helmet

• FAST (stroke) (Face, Arm, Speech, and Time), a mnemonic for the symptoms of a stroke
• Focused assessment with sonography for trauma, an ultrasound used to examine the abdomen of a trauma patient

• Family System Test, a visualization method for representing cohesion and hierarchy constellations in families and similar social systems

• Fourier amplitude sensitivity testing, a variance-based global sensitivity analysis method

• FAST Multimedia AG, former company located in Munich; vendor of graphics boards, video frame grabbers and video processing software; later consumed by Pinnacle Systems
• FAST and later as Fast Search & Transfer, a Norwegian company focusing on data search technologies
• Farnborough Air Sciences Trust, an aviation museum
• Federation Against Software Theft, a UK organization that pursues those who illegally distribute software
• Financial Alliance for Sustainable Trade
• Firefighter assist and search team, a team of firefighters dedicated to the rescue of other firefighters
• Fulbright Academy of Science & Technology

• Fast Robinson (born 1994), English actor known professionally as Eddie-Joe Robinson

• Alexia Fast (born 1992), Canadian actress
• Brad Fast (born 1980), Canadian ice hockey player
• Christian Fast (1762–1841), American soldier and pioneer
• Herman Becker Fast (1887–1945), American businessman, farmer, and politician
• Howard Fast (1914–2003), American novelist and television writer
• Jesper Fast (born 1991), Swedish ice hockey player
• Jonathan Fast (born 1948), American author, son of Howard Fast
• Julius Fast (1919–2008), American author, brother of Howard Fast
• Matt Fast, lead singer of the Canadian punk band The Undecided
• Molly Jong-Fast (born 1978), American author, daughter of Jonathan Fast
• Piotr Fast (born 1951), Polish professor and translator

• Brian Leiser (born 1972), nicknamed "Fast", musician, member of the band Fun Lovin' Criminals
• Fast Eddie (disambiguation)

• Fast Product, a record label
• Faceted Application of Subject Terminology, a thesaurus of subject headings
• Fifteen and Send Time, a type of dog agility competition
• Fairfield and Suisun Transit
• Fast Action Stunt Team (F.A.S.T.), a fictional organization from the TV show Turbo Fast
• Free ad-supported streaming television
• USENIX Conference on File and Storage Technologies

• Nacional Fast Clube, a Brazilian football club
• Fast bowling, a practice in cricket
• All pages with titles beginning with FAST
• All pages with titles beginning with Fast
• All pages with titles containing fast
• All pages with titles containing F.A.S.T.
• Fast Company (disambiguation)
• Faster (disambiguation)