Offside, off-side or off side may refer to:

• Offside (sport), a rule in a number of field team sports restricting where players may position themselves
  • Offside (association football)
  • Offside (American football)
  • Offside (bandy)
  • Offside (rugby)
  • Offside (ice hockey)
  • Offside (field hockey)
• Off side, a side of the field in cricket fielding

• Offside (TV series), Scottish football programme
• Offside (manga), a Japanese football manga from Natsuko Heiuchi
• Offside (2000 film), a 2000 Turkish comedy-drama film
• Offside (2005 film), German film
• Offside (2006 Iranian film), Iranian film
• Offside (2006 Swedish film), Swedish film
• Offside (magazine), Swedish football magazine
• Offside (book), Spanish novel from Manuel Vázquez Montalbán
• Off Sides (Pigs vs. Freaks), 1980s American film starring Eugene Roche, Grant Goodeve and Tony Randall

• Offside, the side of the car furthest from the curb; See Right- and left-hand traffic
• Off-side rule, an interpretation for indentation in some computer programming languages

• Off-site (disambiguation)