Belarus–Russia relations

Belarus and Russia share a land border and constitute the supranational Union State. Several treaties have been concluded between the two nations bilaterally. Russia is Belarus' largest and most important economic and political partner. Both are members of various international organisations, including the Commonwealth of Independent States, the Eurasian Economic Union, the Collective Security Treaty Organization, and the United Nations.

Belarus under Aleksander Lukashenko has been described by Western observers and pro-democracy activists in Belarus as being a client, puppet, satellite or vassal state of Russia under Vladimir Putin.