บรูไนดารุสซาลาม : Brunei Darussalam

Head of State : His Majesty Sultan Haji Hassanal Bolkiah Mu'izzaddin Waddaulah 
Capital : Bandar Seri Begawan 
Language(s) : Malay, English 
Currency : B$ (Brunei Dollar) 
Ministry of Foreign Affairs & Trade of Brunei Darussalam Website: www.mfa.gov.bn

ราชอาณาจักรกัมพูชา : Kingom of Cambodia

Head of State : His Majesty King Norodom Sihamoni  
Head of Government : Prime Minister Hun Sen 
Capital : Phnom Penh 
Language : Khmer 
Currency : Riel Ministry of Foreign Affairs & International Cooperation of Cambodia Website:www.mfaic.gov.kh

สาธารณรัฐอินโดนีเซีย : Republic of Indonesia

Head of State : President Susilo Bambang Yudhoyono 
Capital : Jakarta 
Language : Indonesian 
Currency : Rupiah 
Department of Foreign Affairs of Indonesia Website: www.deplu.go.id

สาธารณรัฐประชาธิปไตยประชาชนลาว : The Loa People's Democratic Republic

Head of State : President Choummaly Sayasone 
Head of Government : Prime Minister Thongsing Thammavong 
Capital : Vientiane 
Language : Lao 
Currency : Kip 
Ministry of Foreign Affairs of Lao PDR Website: www.mofa.gov.la

มาเลเซีย : Malaysia

Head of Government : The Honourable Dato' Sri Mohd Najib bin Tun Abdul Razak 
Capital : Kuala Lumpur 
Language(s) : Malay, English, Chinese, Tamil 
Currency : Ringgit 
Ministry of Foreign Affairs of Malaysia Website: www.kln.gov.my 
ASEAN-Malaysia National Secretariat Website: www.kln.gov.my/myasean

สาธารณรัฐแห่งสหภาพหม่า : Republic of the Union of Myanmar

Head of State : Senior General Than Shwe 
Head of Government : Prime Minister General Thein Sein 
Capital : Nay Pyi Daw 
Language : Myanmar 
Currency : Kyat 
Ministry of Foreign Affairs of Myanmar Website: www.mofa.gov.mm

สาธารณรัฐฟิลิปปินส์ : Republic of the Philippine

Head of State : President Benigno S. Aquino III 
Capital : Manila 
Language(s) : Filipino, English, Spanish 
Currency : Peso 
Department of Foreign Affairs of the Philippines Website: www.dfa.gov.ph

สาธารณรัฐสิงคโปร์ : Republic of Singapore

Head of State : President Tony Tan Keng Yam 
Head of Government : Prime Minister Lee Hsien Loong 
Capital : Singapore 
Language(s) : English, Malay, Mandarin, Tamil 
Currency : S$ (Singapore Dollar) 
Ministry of Foreign Affairs of Singapore Website: www.mfa.gov.sg

ราชอาณาจักรไทย : Kingdom of Thailand

Head of State : His Majesty King Bhumibol Adulyadej 
Head of Government : Prime Minister  (viod)
Capital : Bangkok 
Language : Thai 
Currency : Baht 
Ministry of Foreign Affairs of Thailand Website: www.mfa.go.th

สาธารณรัฐสังคมนิยมเวียดนาม : Socialist Republic of Vietnam

Head of State : President Truong Tan Dang 
Head of Government : Prime Minister Nguyen Tan Dung 
Capital : Ha Noi 
Language : Vietnamese 
Currency : Dong 
Ministry of Foreign Affairs of Viet Nam Website: www.mofa.gov.vn