ABSTRACT: Objectives: To assess dental caries status, knowledge, attitudes and practices (KAP) regarding oral health among Myanmar migrant workers in Mae Sot District, Tak Province, Thailand. Materials and methods: This cross-sectional study was conducted among 130 Myanmar migrant workers aged 26.83+5.77 years who participated in an oral examination and were interviewed by structured questionnaires. Results: Prevalence of caries among this group of workers was 86.9%. Mean DMFT index was 2.09+1.39 teeth/person with untreated decayed teeth only. The majority of workers had good knowledge and attitudes in oral health, but poor score on practices, especially in using oral health services. However, mean DMFT increased when KAP score in oral health decreased. Conclusion: This study suggested changing decayed teeth to filled teeth among in population by increasing oral health facilities and services accessible to Myanmar migrants, especially simple treatment of fillings and oral prophylaxis, including annual oral examination.