This study is to investigate the factors affecting people’s involvement in administration of Namchieo Subdistrict Mnicipality, Laemngop District, Trat Province. The research objectives are to investigate the factors affecting people’s involvement in administration of Namchieo Subdistrict Municipality, Laemngop District, Trat Province. The factors were classified by gender, level of education, monthly earning and length of stay in the community. The research also aimed to investigate the level of people’s involvement in the administration of Namchieo Subdistrict Municipality, Laemngop District, Trat Province at 4 aspects including the participation in the decision – making, the participation in the administration planning, the participation in the administration’s benefits, and the participation in the in performance evaluation.