.357

.357 may refer to:

• .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)