Wang Saphung (Thai: วังสะพุง; IPA: [wāŋ sā.pʰūŋ]) is a district (amphoe) in the central part of Loei Province, northeastern Thailand. The district has been the site of a long-standing dispute between the villagers of Ban Na Nong Bong and its environs and Tungkum Limited, a subsidiary of Tongkah Harbour PCL. Tungkum extracts gold from an open pit mine in district and has been charged with environmental destruction by many of those living nearby.
Khwaeng Wang Saphung was a satellite city of Mueang Lom Sak. It was assigned to be under Mueang Loei on 4 January 1907.