Thailand Udon Thani Yasothon [ edit ] South Chumphon Krabi Nakhon Si Thammarat Narathiwat Pattani Phang Nga Phatthalung Phuket Ranong Satun Songkhla Surat Thani Trang Yala Largest Metropolitan Areas of Thailand Bangkok Pattaya Beach Nakhon Ratchasima Rank Metropolitan area Population Chiang Mai Hatyai 1 Bangkok 11,971,000 2 Pattaya-Chon Buri 1,183,604 3