Events concerning the Grand Theft Auto series in 2003.
- Madd Dogg's album Madd Dogg: Forty Dogg, is digitally remastered.
- Tony Prince founds Maisonette 9.
- Giovanni Ancelotti is convicted of racketeering.
- Lester Leroc is arrested for possession of cocaine.
- Chan Jaoming is arrested for extortion.
- Rudy D'Avanzo is arrested for fraud.
- Charles Martin is arrested for fraud.
- Gracie Ancelotti is arrested for possession of cocaine.
- Cherise McCormic is arrested for driving while intoxicated.
- Michael Graves is arrested for campaign finance law violation.
- Marlon Bridges is arrested for possession of crack cocaine.
- Chloe Parker is arrested for driving while intoxicated.
- The Vespucci Beach Annual Paddle Tennis Tournament is first held in Vespucci Beach, Los Santos.