Lock(s) may refer to:

• Lock and key, a mechanical device used to secure items of importance
• Lock (water navigation), a device for boats to transit between different levels of water, as in a canal

• Lock (film), a 2016 Indian Punjabi-language film
• Lock (Saga of the Skolian Empire), a sentient machine in the novels by Catherine Asaro
• Lock (waltz), a dance figure
• The Lock (Constable), an 1824 painting by John Constable
• The Lock (Fragonard) or The Bolt, a 1777 painting by Jean-Honoré Fragonard
• Locks (album), by Garnet Crow, 2008
• Locked (film), a 2024 American thriller
• Locked (miniseries), a 2020 Indian Telugu-language crime thriller

• Lock, from The Nightmare Before Christmas
• Lock, from Go! Princess PreCure

• Lock (surname)
• Ormer Locklear (1891–1920), American stunt pilot and film actor nicknamed "Lock"
• George Locks (1889–1965), English cricketer
• Lock Martin (1916–1959), stage name of American actor Joseph Lockard Martin, Jr.

• Lock, Ohio, an unincorporated community in the United States
• Lock, South Australia, a small town in the center of the Eyre Peninsula
• Lock Island, an island in the River Thames in England
• Lock Island (Nunavut), an island Peel Sound in Nunavut, Canada

• Lock (rugby league), a player position in rugby league, known as loose forward in the United Kingdom
• Lock (rugby union), a player position in rugby union
• Lock, any of several grappling holds in wrestling, judo and other martial arts

• Lock (computer science), a bookkeeping object used to serialize concurrent access
• Lock (database), a feature used when multiple users access a database concurrently
• File locking, describes a mechanism that restricts access to a computer file
• SIM lock, a restriction on mobile phones to work only in certain countries or with certain providers

• Lock and key, a mechanical device used to secure items of importance
• Lock (firearm), the ignition mechanism of small arms
• Lock (water navigation), a device for boats to transit between different levels of water, as in a canal
• Lock (weapons guidance), missile navigation system's target acquisition fix
• Fermentation lock, a device in beer and wine making that allows carbon dioxide to escape while not allowing air to enter
• Rope lock, a device used in theater fly systems
• Airlock, a compartment for transfer between environments with different atmospheres

• Lock of hair, a piece of hair
• Dreadlocks, or locks, rope-like strands of hair formed by locking or braiding

• All pages with titles beginning with Lock
• All pages with titles containing Lock
• Loc (disambiguation)
• Lok (disambiguation)
• -lock, an Old English suffix
• Loch, a Gaelic term used in Scotland to describe lakes and other bodies of water
• Lock and Key (disambiguation)
• Locke (disambiguation), a common English surname and place name
• Locker (disambiguation)
• Locking (disambiguation)
• LOCKSS (Lots of Copies Keep Stuff Safe), a peer-to-peer network
• Lox, cured salmon filet
• Unlock (disambiguation)