What is even more interesting than the GDP figures for the whole of Thailand, are the data for the different regions and provinces of the country. The static data for 2012 (as provided by the Office of the National Economic and Social Development Board of Thailand (NESDB), show that there are great differences in Gross Domestic Product (GDP) per capita between the different regions and provinces.
The Gross 'Provincial' Product in the Northeast (Isan) and to a lesser extent in the North is substantially lower than in Bangkok, the Central and the Eastern Region. The Gross Provincial Product of the Southern and Western Regions is situated in between.
GDP in Bangkok and surrounding provinces is 5 to 6 times bigger than in the poorest (and populated) Isaan Region of Thailand.
Note that the data provided here are expressed in Thai Baht and indicate real GDP, as compared to the data provided by the World Bank which show the PPP value.