Squadron (21 CS)
* 21st Contracting Squadron (21 CONS)
* 21st Force Support Squadron (21 FSS)
* 21st Logistics Readiness Squadron (21 LRS)
* 21st Security Forces Squadron (21 SFS)

21st Medical Group (21 MDG), Peterson Space Force Base
* 21st Dental Squadron (21 DS)
* 21st Healthcare Operations Squadron (21 HCOS)
* 21st Operational Medical Readiness Squadron (21 OMRS)
* 21st Medical Squadron (21 MDS), Schriever SFB

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