Sierra Vista, which annexed the fort in 1971, is located south and east of the post, and Huachuca City is to the north and east. Major tenants are the NETCOM/9th Signal Command (A) and the United States Army Intelligence Center. Libby Army Airfield is located on post and shares the runway with Sierra Vista Municipal Airport; it was on the list of alternate landing locations for the space shuttle, though was never used as such.