Phon Ngam (Thai: โพนงาม) is a capital tambon (subdistrict) of Buntharik district, in Ubon Ratchathani Province, Thailand.

[1] Neighbouring subdistricts are (clockwise from the south) Huai Kha, Bua Ngam, Nong Sano, and Kho Laen, as well as Champassack and Soukhoumma districts of Laos in the east.

[10] Sukhaphiban Buntharik, a local government covering the town center in the Phon Ngam subdistrict, was created in 1956, two years before regaining district status.

[2] Later in 1985, seven villages in the western area were additionally separated to form a new administrative division, the Bua Ngam subdistrict.

[3] The tambon is located in the eastern region of the Buntharik district; the western area is the low river plains of the Lam Dom Noi River (ลำโดมน้อย), while the eastern is highland of Dângrêk Mountains, the border of Thailand and Laos.