Lockout may refer to:

• Lockout (industry), a type of work stoppage
  • Dublin Lockout, a major industrial dispute between approximately 20,000 workers and 300 employers 1913 - 1914
• Lockout (sports), lockout in sports leagues
  • MLB lockout, lockout in MLB
  • NBA lockout, lockout in NBA
  • NFL lockout, lockout in NFL
  • NHL lockout, lockout in NHL
• Lockout (film), a 2012 science fiction action film
• Lock Out (film), a 1973 Spanish film
• Lockout chip, a computer chip in a video game system to prevent use of unauthorized software
• Lock-out device, part of a signaling system used on game shows
• Regional lockout, a barrier to prevent media use outside of a specific region
• Lockout (news filing), a kind of "dateline" appended to a news report
• Lockout–tagout, a procedure to prevent unsafe activation of machinery
• A period in some hostels during which guests are disallowed from the premises