Mae Hong Son province (Burmese: မဲဟောင်ဆောင်; Thai: แม่ฮ่องสอน, Northern Thai: ᨾᩯ᩵ᩁᩬ᩵ᨦᩈᩬᩁ; Shan: မႄႈႁွင်ႈသွၼ်; formerly called Mae Rong Son), also spelled Maehongson, Mae Hong Sorn or Maehongsorn, is one of Thailand's seventy-six provinces (changwat). It lies in upper northern Thailand and is the westernmost province. Neighboring provinces are (clockwise from north) Shan State of Myanmar, Chiang Mai and Tak. To the west, the province borders Kayin State and Kayah State of Myanmar.
