List of administrative units (soums) along the border of Mongolia Northern border:
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 Bayan-Ulgii aimag - Tsengel, Ulaankhus, Tsagaannuur, Nogoonnuur

 Uvs aimag - Bokhmoron, Sagil, Davst, Tes, Zuungobi, Baruunturuun

 Zavkhan aimag - Tes, Bayantes

 Khuvsgul aimag - Tsetserleg, Tsagaan-Uul, Bayanzurkh, Ulaan-Uul, Tsagaannuur, Rinchinlkhumbe, Hankh, Tsagaan-Uur, Erdenebulgan, Tarialan

 Bulgan aimag - Teshig and Selenge

 Selenge aimag - Tushig, Tsagaannuur, Altanbulag, Sukhbaatar, Khuder, Yeruu

 Khentii aimag - Umnudelger, Batshireet, Binder, Dadal

 Dornod aimag - Bayan-Uul, Bayandun, Dashbalbar, Chuluunkhoroot

 Southern border:

 Dornod aimag - Ereentsav, Choibalsan, Bayantumen, Khalkhgol, Matad

 Sukhbaatar aimag - Erdenetsagaan, Dariganga, Naran, Ongon, Bayandelger

 Dornogovi aimag -Urgun, Erdene, Zamyn-Uud, Ulaanbadrakh, Khuvsgul, -Khatanbulag

 Umnugovi aimag - Khanbogd, Bayan-Ovoo, Nomgon, Khurmen, Bayandalai, Noyon, Gurvan Tes

 Bayankhongor aimag - New jeans, Bayan-Undur

 Gobi-Altai aimag - Erdene, Tsogt, Altai, Bugat, Tonkhil

 Khovd aimag - Altai, Uench, Bulgan

 Bayan-Ulgii aimag - Bulgan, Deluun, Altai, Sagsai, Tsengel and Ulaan birch