Updated October 2026
People from Thailand are called Thai people or Thais. One person is a Thai person, or simply a Thai. Write the word with a capital T.
In Thai, khon Thai (คนไทย) means a Thai person or Thai people. The same English word, Thai, also names the language and describes things associated with Thailand, such as Thai food.
How to use Thai and Thais
These examples show the difference:
- “She is Thai.” Thai describes her nationality.
- “He is a Thai person.” This refers to one person.
- “Several Thais joined the tour.” Thais is a plural noun. “Several Thai people joined the tour” also works.
- “The Thai guides arrived early.” Thai is an adjective, so it stays unchanged even though guides is plural.
- “The guide speaks Thai.” Here, Thai is the language.
Use Thailand for the country: “She is from Thailand.” Avoid “She is from Thai,” “Thais people” and “the Thailand language.” The ordinary phrases are “Thai people” and “the Thai language.”
Thailander is a recorded word, but Thai or Thai person is the usual choice in everyday English. Thainese is not the standard term. Taiwanese relates to Taiwan, not Thailand.
Thai, Tai and Siamese mean different things
In Thai, phasa Thai (ภาษาไทย) means the Thai language, whereas khon Thai refers to people.
Tai, without the h, is often used for a broader group of related languages and peoples. Thai, Lao and Shan belong to the Tai language group. Thai is part of the Kra-Dai language family, also known as Tai-Kadai. A book describing Tai peoples may therefore be discussing communities beyond Thailand, rather than using a shorter spelling for Thai citizens.
Siamese comes from Siam, the country’s historical name. The country first adopted the name Thailand in 1939. Siamese still appears in historical writing and established names, but Thai is the word to use for someone’s present-day nationality. An old reference to Siamese people does not mean a separate modern nationality.
Thai nationality does not describe one ancestry
A person can be Thai by nationality and have Chinese, Malay, Karen or another ethnic background. Thailand also has distinct regional identities, including Northern Thai and Isan, and a range of languages and cultural traditions. These descriptions can overlap: someone does not have to choose between being Thai and identifying with their family’s community.
Thai can also have an ethnic meaning, so the context matters. A discussion of ethnic Thai communities is narrower than a discussion of all Thai citizens. Likewise, living in Thailand does not by itself make someone a Thai citizen, and appearance does not tell you a person’s nationality.
A nationality label does not establish someone’s religion, first language, food preferences or personality. Follow the way the person describes their own background.
Using names when you meet someone
Thai people commonly have a given name, a family name and a nickname used in daily life. The nickname may have no obvious connection to the formal name. Meeting someone who uses a short name such as Nok does not mean you have been given a shortened version of the longer name on a document.
Khun (คุณ) is a polite form of address used with people of different genders. It commonly goes before the given name: Khun Somchai, for example, rather than automatically attaching an English-style title to the family name.
If a guide introduces themselves by a nickname, use that name in conversation. If the introduction is unclear, ask, “What should I call you?” Ask for help with pronunciation if needed, rather than guessing which part of a long name to shorten.