태국 이산지방에 속하는 19개지역.

Isan is divided into 19 provinces, although the southwestern province of Nakhon Ratchasima is considered by some to be more closely connected with Central Thailand.

1. Amnat Charoen
2. Buriram
3. Chaiyaphum
4. Kalasin
5. Khon Kaen
6. Loei
7. Maha Sarakham
8. Mukdahan
9. Nakhon Phanom
10. Nakhon Ratchasima
11. Nongbua Lamphu
12. Nong Khai
13. Roi Et
14. Sakon Nakhon
15. Sisaket
16. Surin
17. Ubon Ratchathani
18. Udon Thani
19. Yasothon

Isan returns 136 of the national parliament's 400 constituency MPs. In the 2005 election the Thai Rak Thai party took 126 of these seats, with six for Chart Thai and two each for the Democrat party and Mahachon Party [1].