The United States of America maintains its presence in Thailand through the US embassy in Bangkok and the US consulate in Chiang Mai.

The US Embassy in Bangkok, Thailand is the third largest American embassy in the world. As such, it provides a wide range of services primarily focusing on the advancement of the American economic and commercial interests and the protection of US citizens not only in Thailand but in the South East Asian region as a whole.  Mr. Eric John, the current US ambassador to Thailand leads the US embassy in Bangkok and the US consulate in Chiang Mai.

To carry out its multifarious functions, the embassy has several sections and offices working together towards the achievement of its goals and objectives in the region.  These include the Consular Section, Defense Attaché Office, Economic Section, Management Section, Media and Cultural Section, Political Section, Refugee and Migration Affairs Office, Regional Environmental Affairs Office for Southeast Asia, Regional Security Office and Transnational Crime Affairs Section.

The Consular section of the U.S. Embassy in Bangkok is further bifurcated into American Citizen Services and the Visa Section.

The American Citizen Services unit is tasked to assist American expatriates and visitors to Thailand and neighboring countries by providing assistance in passport application including the issuance of emergency passports and other related travel documents, reports of birth and death in Thailand, legalizations, facilitating applications for federal benefits and providing emergency assistance to distressed Americans.
 
The Visa Section, on the other hand, services foreigners who would like to enter the the US for temporary visit or for indefinite or permanent stay. In particular, the embassy in Bangkok processes all types of visa applications i.e. non-immigrant and immigrant visas. Non-immigrant visas include tourist visas and business visas while immigrant visas can be in the form of K1 Fiancé Visa, K3 Marriage Visa, CR-1, IR-1, and Work Visa among others. Meanwhile, the U.S. Consulate in Chiang Mai can only process nonimmigrant visas in the north-western 16 provinces and assists Americans living in or visiting the province.

The US embassy in Bangkok is located at 120/22 Wireless Road, Bangkok, Thailand 10330. It operates Monday-Friday from 7 AM to 4 PM. It is closed on official holidays. The embassy can be reached via Tel: +66-2-205-4000.  For further information about the US embassy in Bangkok, you can log into http://bangkok.usembassy.gov/

The US Consulate in Chiang Mai is found on Wichayanond Road. You may contact the consulate via Tel: +66-53-107-700. You can also log in to the consulate’s official website at http://chiangmai.usconsulate.gov/ for more information.