| Name | Country | Feature class | Latitude | Longitude | |
|---|---|---|---|---|---|
2101  | Ulyaasata Dugang Ulyaasata Dugang,Ulyasuto dugun,Ulyasuty-dugun | Mongolia, Selenge Province | populated place | N 50° 5′ 0'' | E 106° 10′ 0'' |
2102  | Ulichi Gora Ulichi,Ulichi,Ulichi Uul | Mongolia, Selenge Province | mountain | N 48° 42′ 0'' | E 107° 21′ 0'' |
| 2103 | Ulhanii Dabaa Pereval Ulkhuni daba,Ulhanii Dabaa | Mongolia, Khövsgöl Province | pass | N 50° 40′ 0'' | E 100° 1′ 0'' |
| 2104 | Uldz  Norbolin,Norovlin,Norowlin,Norvulin,Uldz,Улдз | Mongolia, Hentiy | seat of a second-order administrative division | N 48° 41′ 25'' | E 111° 59′ 40'' |
| 2105 | Ulaan-Uul Barun Ul'dzeytu Sumu,Barun Ultszeytu Somon,Baruun Oldzeyte,Baruun Oldzeyte Suma,Baruun Öldzeyte,Baru... | Mongolia, Bayanhongor | seat of a second-order administrative division | N 46° 4′ 2'' | E 100° 49′ 2'' |
| 2106 | Ulaan-Uul Erdene,Erdeni,Erdeni Somon,Erdeni Suma,Erdeni Sume,Erdeni sumu,Ulaan-Uul | Mongolia, East Gobi Aymag | seat of a second-order administrative division | N 44° 20′ 0'' | E 111° 14′ 0'' |
| 2107 | Ulaan Ovoot Ulaan Ovoot,Wu-lan-ao-pao-t'e,Wu-lan-ao-pao-t’e | Mongolia, Sühbaatar | mountain | N 45° 11′ 0'' | E 114° 25′ 0'' |
2108  | Ulaan Öndör | Mongolia, Sühbaatar | area | N 47° 41′ 0'' | E 112° 13′ 0'' |
2109  | Ulaan Nuurii Shanda Nuur | Mongolia, East Aimak | lake | N 47° 40′ 0'' | E 114° 18′ 0'' |
| 2110 | Ulaan Nuur | Mongolia, East Aimak | lake | N 48° 56′ 0'' | E 114° 8′ 0'' |
| 2111 | Ulaan Nuur | Mongolia, East Aimak | lake | N 47° 41′ 0'' | E 114° 31′ 0'' |
| 2112 | Ulaan Nuur | Mongolia, Central Aimak | lake | N 46° 34′ 0'' | E 107° 46′ 0'' |
| 2113 | Ulaan Nuur | Mongolia, Ömnögovĭ | lake | N 44° 31′ 0'' | E 103° 38′ 0'' |
| 2114 | Ulaan Honhoriin Toyrim Nuur | Mongolia, East Aimak | lake | N 47° 26′ 0'' | E 114° 34′ 0'' |
| 2115 | Ulaan Hoigorun Nuur | Mongolia, East Aimak | lake | N 47° 3′ 0'' | E 116° 5′ 0'' |
| 2116 | Ulaan Hada Gora Ulan-Khada,Ulaan Hada,Ulaan Hada Uul | Mongolia, Selenge Province | mountain | N 49° 7′ 0'' | E 107° 39′ 0'' |
| 2117 | Ulaan Engeriin | Mongolia, East Aimak | area | N 46° 58′ 0'' | E 115° 15′ 0'' |
| 2118 | Ulaan Dzüleg Ulaan Dzuleg,Ulaan Dzüleg,Ulaan Tsulig,Ulan Dzulek | Mongolia, East Aimak | populated place | N 47° 30′ 0'' | E 115° 20′ 0'' |
| 2119 | Ulaan Dabaa Ulaan Dabaa,Ulan-daba,Uran-daba | Mongolia, Central Aimak | populated place | N 48° 1′ 0'' | E 107° 40′ 0'' |
| 2120 | Ulaan Chuluutayn Hüryee Ulaan Chuluutayn Huryee,Ulaan Chuluutayn Hüryee,Ulaan-Chuluutayn-Huree,Ulan-chulutuin Khure | Mongolia, Arkhangai Province | populated place | N 48° 1′ 0'' | E 102° 8′ 0'' |
| 2121 | Ulaan Chuluunii Batorīn | Mongolia, East Aimak | area | N 47° 17′ 0'' | E 115° 17′ 0'' |
| 2122 | Ulaan Bokudoro | Mongolia, East Aimak | area | N 47° 32′ 0'' | E 117° 11′ 0'' |
| 2123 | Üher Subarga | Mongolia, East Aimak | area | N 46° 58′ 0'' | E 116° 15′ 0'' |
| 2124 | Uhaa Tolgoy Hua-t'ao-le-kai,Hua-t’ao-le-kai,Uhaa Tolgoy | Mongolia, Sühbaatar | mountain | N 45° 23′ 0'' | E 114° 30′ 0'' |
| 2125 | Uhaa Hushuunii Hiid Uhaa Hushuunii Hiid,Ukha-khushuny-khid,Ukha-khushunyy khid | Mongolia, Hentiy | populated place | N 48° 46′ 0'' | E 111° 59′ 0'' |
| 2126 | Uhaa Hudagiin Nuur | Mongolia, East Aimak | lake | N 47° 20′ 0'' | E 114° 11′ 0'' |
| 2127 | Uhaa Hudagiin Nurr | Mongolia, East Aimak | lake | N 47° 22′ 0'' | E 114° 12′ 0'' |
| 2128 | Uhaa Adzarga Gora Ukha Atszarga,Uhaa Adzarga,Uhaa Adzarga Uul,Ukha Atszarga Ula | Mongolia, Arkhangai Province | mountain | N 47° 58′ 0'' | E 102° 5′ 0'' |
| 2129 | Ugtamiin Araiin Örtöö Ugtamiin Araiin Ortoo,Ugtamiin Araiin Örtöö,Ugtumyin Aryyn Urto,Ugtumyn Aryn Urto,Ugtumyyn aryyn urt... | Mongolia, East Aimak | populated place | N 49° 24′ 0'' | E 113° 46′ 0'' |
| 2130 | Ugan Nuur | Mongolia, East Aimak | lake | N 49° 47′ 0'' | E 115° 12′ 0'' |
| 2131 | Ugaldza Uula Gora Ugaltsza ula,Ugaldza Uul,Ugaldza Uula | Mongolia, Övörhangay | mountain | N 44° 54′ 0'' | E 102° 31′ 0'' |
| 2132 | Udzegiin Nuur | Mongolia, Sühbaatar | lake | N 45° 22′ 0'' | E 113° 18′ 0'' |
| 2133 | Üdzegiin Hudag Kolodets Chizdyn khud,Kolodets Uidzyn Khudyk,Kolodets Utszin-Khuduk,Kolodets Uydzygyn khuduk,Udzegii... | Mongolia, East Aimak | well | N 47° 45′ 0'' | E 118° 1′ 0'' |
| 2134 | Ububōgiin Nuur | Mongolia, East Aimak | lake | N 47° 35′ 0'' | E 114° 44′ 0'' |
| 2135 | Tüyn Gol Da Ying River,T'u-yin Ho,T'u-yin-kuo-lo,T'ui Ho,Tatsa Gol,Tuin Gol,Tuin Gool,Tuy'iin gol,Tuyin Gol,T... | Mongolia, Bayanhongor | stream | N 45° 5′ 0'' | E 100° 52′ 0'' |
| 2136 | Tuul River T'u-la,T'u-la Ho,Tola Gol,Toola gol,Tora Ho,Tula River,Tula gol,Tuul,Tuul Gol,Tuul River,Tuula Gol,T... | Mongolia, | stream | N 48° 57′ 0'' | E 104° 48′ 0'' |
| 2137 | Tüshilge Gora Khalgyn-Ula,Tushilge,Tüshilge,Гора Халгын-Ула | Mongolia, East Gobi Aymag | mountain elevation 1060m | N 44° 47′ 17'' | E 110° 5′ 3'' |
| 2138 | Tusgay Manhan T'u-ssu-kai-mang-han,Tusgay Manhan,T’u-ssu-kai-mang-han | Mongolia, East Aimak | desert | N 47° 43′ 0'' | E 118° 56′ 0'' |
| 2139 | Tunhiliin Hüryee Tunhiliin Huryee,Tunhiliin Hüryee,Tunkh,Tunkhilyyn Khure | Mongolia, Selenge Province | populated place | N 48° 39′ 0'' | E 106° 44′ 0'' |
| 2140 | Tungay Tsagaan Nuur | Mongolia, East Aimak | lake | N 48° 44′ 0'' | E 114° 31′ 0'' |
| 2141 | Tümelteyn Süme Kumeltuin Sume,Tumelteyn Sume,Tumeltuin sume,Tümelteyn Süme | Mongolia, Övörhangay | populated place | N 47° 9′ 0'' | E 104° 2′ 0'' |
| 2142 | Tulgaiin Jisa Tulagain chzhisa,Tulagayn Chzhisa,Tulagayn Jisa,Tulgaiin Jisa | Mongolia, Middle Govĭ | populated place | N 46° 30′ 0'' | E 107° 52′ 0'' |
| 2143 | Tsulhur-Dugan Culkhur-Dugan,Tsulhur-Dugan,Цулхур-Дуган | Mongolia, Bulgan | populated place | N 49° 30′ 0'' | E 104° 21′ 0'' |
| 2144 | Tsosoiin Dabaa Pereval Tsosuin daba,Tsosoiin Dabaa | Mongolia, Bulgan | pass | N 49° 55′ 0'' | E 104° 24′ 0'' |
| 2145 | Tsorbo Haan Uula Gora Tsorba-khan-ula,Tsorbo Haan Uula | Mongolia, Hentiy | mountain | N 48° 53′ 0'' | E 109° 36′ 0'' |
| 2146 | Tsoohoriin Hural Tsakhirin Khural,Tsokhoriin Khural,Tsoohoriin Hural | Mongolia, Bulgan | populated place | N 47° 38′ 0'' | E 104° 25′ 0'' |
| 2147 | Tsonjiin Chuluu Gora Tsonchzhiin-chulu,Gora Tsonchzhiyn-Nuru,Tsonjiin Chuluu | Mongolia, Hentiy | mountain | N 49° 13′ 0'' | E 108° 43′ 0'' |
| 2148 | Tsongoliin Dabaa Pass Tsongo-lon-daba,Pass Tsongo-lön-daba,Pereval Tsongo-lyn-daba,Tsongoliin Dabaa | Mongolia, Selenge Province | pass | N 49° 12′ 0'' | E 107° 5′ 0'' |
| 2149 | Tsomog Dalanjargalan,Tsomog | Mongolia, East Gobi Aymag | seat of a second-order administrative division | N 45° 55′ 0'' | E 109° 4′ 0'' |
| 2150 | Tsohyootoyn Hiid Tsohyootayn Hiid,Tsohyootoyn Hiid,Tsokhiotuin khid,Tsokhiotuyn Khid | Mongolia, Ömnögovĭ | populated place | N 43° 40′ 0'' | E 107° 13′ 0'' |
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