From a demographic survey and interviews, there were 306 Mien migrants residing in Chiang Mai municipality, fewer than half of the total population. Most of them were single, in the school and working ages, and adhered to their ethnic beliefs rather than Christianity. Over half of them were self-employed, selling soybean milk, fried chicken or ice-cream. They mostly lived with their families and had a close relationship with family members in their hometown communities. They returned home on important festivals and sent remittances to their families in their hometowns. Besides their relatives, the migrants gathered with those of the same occupations and residences to interact and help one another as well as to do community services in their hometown communities on occasions. The mass migration to cities during the past ten years was the result of a modern educational system that focused on producing labor for service and industry sectors, a state policy that relocated people out of the forests after the end of the Communist War, and a sharp drop of produce prices after the economic meltdown. Nevertheless, various social capitals of the ethnic group have been a solid foundation for them to adapt to urban occupations and lifestyles.