Möng Hsat was small state of the Shan States in what is today Burma.
It was a small dependency of Kengtung State that had been a tract of land claimed by Möng Nai but annexed by Kengtung along with Möng Pu further to the north. The capital and residence of the ruler was Möng Hsat town. Earlier, in 638 CE, the area had formed part of the Ngoenyang Kingdom, which was centered in what is now Mae Sai District of Thailand.
Little is known about this state except that its forests had been overexploited at the turn of the 20th century during British Rule in Burma.