04 may refer to:
The year 2004, or any year ending with 04 The month of April 4 (number) 04 (Six by Seven album) 04 (Urban Zakapa album) 04, department number of Alpes-de-Haute-Provence, France Several German football teams, including: Bayer 04 Leverkusen FC Ingolstadt 04 1. FC Neubrandenburg 04 FC Schalke 04 Mobile phones in Australia (prefix 04)
See also O4 (disambiguation)