The thesis investigated socio-economic adaptation of Mien women immigrants in Washington State, USA. Permission to immigrate was granted due to political problems after the war led by America and other ethnic groups against communists in Laos and Southeast Asia and was in exchange for their assistance to America. After the war, Laos was controlled by the communist army. Retaliation was threatened by the communist government, so the Mien immigrated to refugee camps in Thailand before being relocated to America. The investigation revealed that American-born Mien women were able to adapt to American culture well, but lacked knowledge and understanding of their own ethnic culture, including their ethnic language (20-year-old group). Those born and raised in Laos were able to adapt to American culture at a medium level (47-year-old group). The elderly group (73-year-old group) was having difficulty in adapting to American culture as they were hardly able to speak English and led their ethnic way of life, the least adaptable among the three groups.