The Iceland Defense Force was a military command of the United States Armed Forces from 1951 to 2006. The IDF, created at the request of NATO, came into existence when the United States signed an agreement to provide for the defense of Iceland, which has only limited defense forces.

Iceland's defence forces consist of the Icelandic Coast Guard, which patrols Icelandic waters and monitors its airspace, and other services such as the National Commissioner's National Security and Special Forces Units. Iceland maintains no standing army, the only NATO member for which this is the case.