The Mon are an ethnic group

Ethnic group

An ethnic group is a group of people whose members identify with each other, through a common heritage, often consisting of a common language, a common culture and/or an ideology that stresses common ancestry or endogamy...

 from Burma (Myanmar), living mostly in Mon State

Mon State

Mon State is an administrative division of Myanmar. It is sandwiched between Kayin State on the east, the Andaman Sea on the west, Bago Region on the north and Tanintharyi Region on the south, and has a short border with Thailand's Kanchanaburi Province at its south-eastern tip. The land area is...

, Bago Division

Bago Division

Bago Region is an administrative region of Burma, located in the southern central part of the country. It is bordered by Magway Region and Mandalay Region to the north; Kayin State, Mon State and the Gulf of Martaban to the east; Yangon Region to the south and Ayeyarwady Region and Rakhine State...

, the Irrawaddy Delta

Irrawaddy Delta

The Irrawaddy Delta or Ayeyarwady Delta lies in the Ayeyarwady Region , the lowest expanse of land in Burma that fans out from the limit of tidal influence at Myan Aung to the Bay of Bengal and Andaman Sea, 290 km to the south at the mouth of the Ayeyarwady River...

, and along the southern Thai–Burmese border. One of the earliest peoples to reside in Southeast Asia

Southeast Asia

Southeast Asia, South-East Asia, South East Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia. The region lies on the intersection of geological plates, with heavy seismic...

, the Mon were responsible for the spread of Theravada Buddhism in Burma and Thailand. The Mon culture is credited as a major source of influence on the dominant Burmese culture.

As the eastern Mon were absorbed into the Thai society long ago, the western Mon of Burma have largely assimilated into Burmese society.