Member states of the Eurasian Economic Union

Russia, or the Russian Federation, is a country in Eastern Europe and North Asia. It is the largest country in the world, spanning eleven time zones and sharing land borders with fourteen countries. With a population of over 140 million, Russia is the most populous country in Europe and the ninth-most populous in the world. It is a highly urbanised country, with sixteen of its urban areas having more than 1 million inhabitants. Moscow, the most populous metropolitan area in Europe, is the capital and largest city of Russia, while Saint Petersburg is its second-largest city and a major cul

Belarus, officially the Republic of Belarus, is a landlocked country in Eastern Europe. It is bordered by Russia to the east and northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Belarus spans an area of with a population of . The country has a hemiboreal climate and is administratively divided into six regions. Minsk is the capital and largest city; it is administered separately as a city with special status.

Armenia, officially the Republic of Armenia, is a landlocked country in the Armenian highlands of West Asia. It is a part of the Caucasus region and is bordered by Turkey to the west, Georgia to the north, Azerbaijan to the east, and Iran and the Azerbaijani exclave of Nakhchivan to the south. Yerevan is the capital, largest city and financial center.

Kazakhstan, officially the Republic of Kazakhstan, is a landlocked country situated primarily in Central Asia, with a portion of its territory extending into Eastern Europe. It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbekistan to the south, and Turkmenistan to the southwest, and it has a coastline along the Caspian Sea. The capital is Astana and the country's largest city and principal cultural and economic center is Almaty, which served as the capital until 1997.

Kyrgyzstan, officially the Kyrgyz Republic, formerly known as Kirghizia, is a landlocked country in the eastern regions of Central Asia, lying in the Tian Shan and Pamir mountain ranges. It is bordered by Kazakhstan to the north, Uzbekistan to the west, Tajikistan to the south, and China to the east and southeast. Kyrgyzstan's capital and largest city is Bishkek which lies on the northern border with Kazakhstan. Ethnic Kyrgyz make up the majority of the country's over 7.4 million people, followed by significant minorities of Uzbeks and Russians.