Thailand's four regions are the largest subdivisions of the country. In contrast to the provinces the regions have no administrative character, but are subdivisions of Thailand used for statistical or other geographical purposes only. The four most common regions are:

Northern Region of Thailand

Northeast Region of Thailand - Isaan

Central Region of Thailand

Southern Region of Thailand

While these four regions are always defined with the same territorial extend, the less common further subdivision of the central region into three or four regions differs in its extends.