The term United Nations Medal refers to one of several international decorations which are issued by the United Nations (U.N.) to the various militaries of the world for participation in joint international military and police operations such as peacekeeping, humanitarian efforts, and disaster relief. A United Nations Medal is ranked in most militaries and police forces as a service medal, meaning that it is not issued for a specific heroic or meritorious act, but rather for general participation in a broad operation.

The most common United Nations Medal is the standard U.N. decoration known simply as the United Nations Medal. Most countries bestow this award for any action in which a member of the military participated in a joint U.N. activity. In situations where a service member participated in multiple U.N. operations, service stars or campaign clasps are authorized as attachments to the United Nations Medal.