The local population of Mae Sariang is of mixed origin. The main ethnicity in the low land plain, town center and its satellite villages along the river is Tai Yuan (Northern Thai or Lanna people) with some cross-marriage with other ethnicities.
In Mae Sariang, the local populace comprises various ethnic backgrounds. The predominant ethnicity found in the low-lying areas, central towns, and surrounding villages by the riverside is Tai Yuan (Northern Thai or Lanna people), along with occasional marriages to other ethnicities.