Thailand has traditionally been rather free with visas, and most westerners still receive 30 day entry stamps on arrival. However, like just about every other country since 2001, security concerns have lead to a reduction in the number of countries automatically granted visas.

For a current list of countries entitled to visa-free entry, please visit:
http://thaiwebsites.com/newvisarules.asp.

To locate the Thai Consulate or Embassy in your country, please visit:
http://www.thaiembassy.org/.

For more information on obtaining visas, please visit :
http://www.mfa.go.th/web/12.php.