Kengtung (; Shan: Chiang Tung), known as Menggen Prefecture () or Möng Khün Chiefdom or Mueng Khuen Fu (Tai Khün: ) from 1405 to 1895, was a Shan state in what is today Burma. The capital and the residence of the ruler was Kengtung (then known as Tai Khuen City 歹掯城) in the centre of the state. It was the only urban area in this mountainous state whose landscape is dominated by the Daen Lao Range.