.357

357 or .357 may refer to:

• {{Interlanguage link|357 (band)|lt=357 (band)|sr|357 (музичка група)|WD=}}, a Serbian rock band
• .357 Magnum, a firearm cartridge (revolver)
• .357 SIG, a firearm cartridge (pistol)
• .357 Remington Maximum, a wildcat firearm cartridge (revolver)
• .357/44 Bain & Davis, a wildcat firearm cartridge (pistol)
• .357 Peterbilt, a wildcat firearm cartridge (pistol)
• .357 Super Magnum, a wildcat firearm cartridge (revolver)