Tha Mai (, ) is a tambon (subdistrict) of Tha Mai District, in Chanthaburi Province, Thailand. In 2017 it had a total population of 8,137 people.
The tambon has no administrative villages (muban).
The whole area of the subdistrict is covered by the town (Thesaban Mueang) Tha Mai (à ¹Âà ¸Âà ¸¨à ¸Âà ¸²à ¸¥à ¹Âà ¸¡à ¸·à ¸Âà ¸Âà ¸Âà ¹Âà ¸²à ¹Âà ¸«à ¸¡à ¹Â).