Möng Küng, also known as Maingkaing (), was a Shan state in what is today Burma. It belonged to the Eastern Division of the Southern Shan States. Its capital was Mong Kung, in the valley of the Nam Teng. The largest minority were Palaung people.
Möng Küng was founded in ancient times as Langkavadi. In 1835, after the British annexed Upper Burma and established their rule in the region, Möng Küng had been formerly a feudatory state of Hsenwi.
The rulers of Möng Küng bore the title Myoza in 1835-54 and 1863âÂÂ73; Saopha in 1854-63 and from 1873.