Tambon Huai Krachao, Wang Phai, Sa Long Ruea and Don Salaep were separated from Phanon Thuan district and formed the minor district (King Amphoe) Huai Krachao on April 30, 1994.1 It was official upgraded to be full district on October 11th, 1997.2
The district is subdivided into 4 subdistricts (tambon), which are further subdivided into 67 villages (muban). There are no municipal (thesaban) areas, and 4 Tambon administrative organizations (TAO).