IDEC

IDEC may refer to:


 * Biogen Idec, a biotechnology company
 * IDEC Corporation, a Japanese manufacturer of automation and control products
 * International Democratic Education Conference, an annual academic and youth conference
 * Toralizumab (IDEC 131), an antibody and an immunosuppressive drug
 * The sponsor name given to ocean racing trimarans skippered by French yachtsman Francis Joyon:
 * IDEC-1, a 75ft trimaran built in 1985
 * IDEC 2, a 97ft trimaran built in 2007
 * IDEC 3, a 103ft trimaran built in 2006