A six-region system is commonly used for geographical and scientific purposes.
It divides the country into the following regions: The four-region system, used in some administrative and statistical contexts, and also as a loose cultural grouping, includes the western and eastern regions within the central region, while grouping the provinces of Sukhothai, Phitsanulok, Phichit, Kamphaeng Phet, Phetchabun, Nakhon Sawan, and Uthai Thani in the northern region.
[2] It differs from the four-region system in that the east is regarded as a separate region, the south is divided into east and west coasts, and Nakhon Sawan and Uthai Thani are grouped in the central region.
Thailand's economic activities are concentrated in Bangkok and the central region.
[3] This is a list of the 4 Thai regions and the capital city of Bangkok by Human Development Index as of 2024 with data for the year 2022.