All authority in heaven and on earth has been given to me. Therefore, go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age.
- Matthew 28:18-20

The Mekong Region is comprised of the 5 following nations:

China

Population – 1,330,141,295 (July 2010 est.) ^[1]

People Groups – Han Chinese 91.5%, Zhuang, Manchu, Hui, Miao, Uighur, Tujia, Yi, Mongol, Tibetan, Buyi, Dong, Yao, Korean, and other nationalities 8.5% (2000 census) ^[1]

Religions – Non-religious 47.6 %, Traditional Ethnic 21.8%, Buddhist 21.4%, Christian 7.3%, Muslim 2% ^[2]

Thailand

Population – 67,089,500 (July 2010 est.) ^[1]

People Groups – Thai 75%, Chinese 14%, other 11% ^[1]

Religions – Buddhist 86.7%, Muslim 6.3%, Traditional Ethnic 2.3%, Agnostic 1.8%, Christian 1.3%, Chinese Universalist 0.9%, Confucianist 0.4%, Atheist 0.1%, Sikh 0.1%, Hindu 0.1%, Baha’i 0.1% ^[3]

Vietnam

Population – 89,571,130 (July 2010 est.) ^[1]

People Groups – Kinh (Viet) 86.2%, Tay 1.9%, Thai 1.7%, Muong 1.5%, Khome 1.4%, Hoa 1.1%, Nun 1.1%, Hmong 1%, others 4.1% (1999 census) ^[1]

Religions – Buddhist 49.2%, Agnostic 12.6%, Neo-religions 11.0%, Traditional Ethnic 10.4%, Christian 8.2%, Atheist 6.9%, Chinese Universalist 1.0%, Baha’i 0.4%, Muslim 0.2%, Hindu 0.1% ^[3]

It will not do to say that you have no special call to go to China. With these facts before you and with the command of the Lord Jesus to go and preach the gospel to every creature, you need rather to ascertain whether you have a special call to stay at home.
- Hudson Taylor

Laos

Population – 6,368,162 (July 2010 est.) ^[1]

People Groups – Lao 55%, Khmou 11%, Hmong 8%, other (over 100 minor ethnic groups) 26% (2005 census) ^[1]

Religions – Buddhist 52.9%, Traditional Ethnic 38.9%, Agnostic 3.3%, Christian 3.1%, Atheist 0.9%, Chinese Univeralist 0.4%, Neo-religions 0.2%, Baha’i 0.2%, Hindu 0.1%, Muslim 0.1% ^[3]

Myanmar

Population – 53,414,374 (July 2010 est.) ^[1]

People Groups – Burman 68%, Shan 9%, Karen 7%, Rakhine 4%, Chinese 3%, Indian 2%, Mon 2%, other 5% ^[1]

Religions – Buddhist 74.0%, Traditional Ethnic 10.6%, Christian 7.5%, Muslim 3.8%, Hindu 1.7%, Confucianist 1.5%, Agnostic 0.4%, Chinese Universalist 0.3%, Baha’i 0.2% ^[3]

1. ^[1] CIA World Factbook ↩
2. ^[2] The Joshua Project ↩
3. ^[3] The ARDA ↩