Lamphun in the context of Thesaban mueang

The Mon (Mon: ဂကူမန်listen; Thai Mon: ဂကူမည်; Burmese: မွန်လူမျိုး‌, pronounced [mʊ̀ɰ̃ lù mjó]; Thai: มอญ, pronounced [mɔ̄ːn] listen) are an ethnic group who inhabit Lower Myanmar's Mon State, Kayin State, Kayah State, Tanintharyi Region, Bago Region, the Irrawaddy Delta, and several areas in Thailand (mostly in Pathum Thani province, Phra Pradaeng and Nong Ya Plong). The native language is Mon, which belongs to the Monic branch of the Austroasiatic language family and shares a common origin with the Nyah Kur language, which is spoken by the people of the same name that live in Northeastern Thailand. A number of languages in Mainland Southeast Asia are influenced by the Mon language, which is also in turn influenced by those languages.

The Mon were one of the earliest to reside in Southeast Asia, and were responsible for the spread of Theravada Buddhism in Mainland Southeast Asia. The civilizations founded by the Mon were some of the earliest in Thailand as well as Myanmar and Laos. The Mon are regarded as a large exporter of Southeast Asian culture. Historically, many cities in Myanmar, Thailand, and Laos today, including Yangon, Pathum Thani, Lamphun, Lampang, and Vientiane were founded either by the Mon people or Mon rulers.

Haripuñjaya (Central and Northern Thai: หริภุญชัย RTGS: Hariphunchai, also spelled Haribhuñjaya) was a Mon kingdom in what is now Northern Thailand, existing from the 7th or 8th to 13th century CE. Its capital was at Lamphun, which at the time was also called Haripuñjaya. In 1292 the city was besieged and captured by Mangrai of the Tai kingdom of Lan Na.

The kingdom is referred to as K'un-lun in ancient Chinese records.