IDD or Idd may refer to:

Academia

  • International Development Department, an academic department on poverty reduction at the University of Birmingham
  • Integrated Dual Degree program

Locations

  • Idd, a parish and former municipality in Halden, Norway

Observances

  • International Dance Day
  • International Day of Democracy

People with the surname

  • Dolal Idd, an American killed in an exchange of gunfire with Minneapolis police

Science and technology

  • Insulin-dependent diabetes, called diabetes mellitus type 1
  • Interictal dysphoric disorder
  • International direct dialing, in telephony
  • Iodine deficiency disorders, commonly used when discussing IDD eradication programs
  • I<sub>DD</sub>, the electric current in the drains of a CMOS circuit
  • Interface Design Description, in the military software standard MIL-STD-498
  • Intellectual Development Disorder
  • Integration Driven Development