泰化是指泰国尝试同化不同民族与文化入泰人文化中。这个政策是二十世纪泰国成为一个民族国家后出现。

泰化是1930年代銮披汶·颂堪政变后的民族主义政策，他们推行同化政策想将泰国华人等少数民族同化成泰人，泰语成为官方语言，泰族文化成为官方文化。每天两次播国歌。

Thaification, or Thai-ization is the process by which people of different cultural and ethnic origins living in Thailand become assimilated to the dominant culture of Thailand, or more precisely, to the culture of the Central Thais.

Thaification was a step in the creation in the 20th century of the Thai nation state where Thai people occupy a dominant position, away from the historically multicultural kingdom of Siam. A related term, "Thainess", is held to describe a characteristic that persons and things possess when they are Thai.