004

004, 0O4, O04, OO4 may refer to:


 * 004, fictional British 00 Agent
 * 0O4, Corning Municipal Airport (California)
 * O04, the Oversea-Chinese Banking Corporation
 * Abdul Haq Wasiq, Guantanamo detainee 004
 * Junkers Jumo 004 turbojet engine
 * Lauda Air Flight 004, an international passenger flight operated by a Boeing 767-300ER that crashed on 26 May 1991
 * Charmander, the 4th Pokémon (#004) from the first generation Kanto region Pokédex