What city is the capital of Thailand?

Bangkok is the capital of Thailand, serving as the political, economic, and cultural center of the country. This bustling metropolis is known for its vibrant street life, ornate shrines, and rich history, making it one of the most visited cities in the world. Bangkok is not only the largest city in Thailand but also a prime location for international commerce and tourism.

On the other hand, Chiang Mai is known for its mountains and temples, and while it is a significant city in Northern Thailand, it does not serve as the capital. Bangkok Noi is a district within Bangkok, and Pattaya is a coastal city famous for its beaches and nightlife, but it is not the capital of Thailand. Thus, Bangkok's status as the capital city is well-established and widely recognized, making it the correct answer.