The rank of admiral exists in the United States Navy, United States Coast Guard, National Oceanic and Atmospheric Administration Commissioned Officer Corps (and its predecessors, the United States Coast and Geodetic Survey Corps and the Environmental Science Services Administration Corps), and the United States Public Health Service Commissioned Corps.

In the United States Army, United States Marine Corps, and United States Air Force, the comparable rank is general. See Category:American generals.

Wikimedia Commons has media related to Admirals of the United States.