407th may refer to:
407th Air Expeditionary Group, provisional United States Air Force unit assigned to the United States Air Forces Central 321st Air Expeditionary Wing 407th Air Refueling Squadron, inactive United States Air Force unit 407th Brigade Support Battalion, support battalion of the United States Army 407th Military Hospital (Ukraine), military hospital of the Ukrainian Armed Forces in Chernihiv 407th Support Brigade (United States), support brigade of the United States Army
See also 407 (number) 407, the year 407 (CDVII) of the Julian calendar 407 BC