# Bayan-Olgii Aimag, Mongolia – Soums, Population & Map > Source: https://wherepedia.org/mongolia/bayan-olgii/ Aimag · Mongolia # Bayan-Olgii Aimag Bayan-Olgii Aimag is an aimag (province) of Mongolia. It had an estimated **103,003 people** in 2021 on 45,754 km² (about 2 per km²). Its main town is Ölgii. It is divided into 13 soums. 56 named villages and localities are recorded here, and 128 mapped services such as hospitals, banks and schools. - 103,003people (2021) - 45,754km² - 13soums - 128mapped services ## How many people live in Bayan-Olgii Aimag? Bayan-Olgii Aimag had an estimated **103,003 people** in 2021 — 3.1% of Mongolia, 5th of 22 aimags. There are 1,007 women for every 1,000 men (below the Mongolia figure of 1,033). Spread over 45,754 km², that is about **2 people per km²**, 6th of 22 aimags. 35.7% of people are children under 15 and 3.3% are 65 or older; the median age is about 23 years (it is 28 across Mongolia). For every 100 people of working age (15–64) there are 64 children and older people. 0–4 ****14,626** 5–9 ****12,155** 10–14 ****10,038** 15–19 ****9,564** 20–24 ****8,850** 25–29 ****8,504** 30–34 ****8,012** 35–39 ****6,623** 40–44 ****5,769** 45–49 ****5,232** 50–54 ****4,258** 55–59 ****3,489** 60–64 ****2,528** 65–69 ****1,383** 70+ ****1,970** Source: [National Statistics Office of Mongolia - Mongolian Statistical information service via OCHA HDX, population 2021 (COD-PS, CC BY-IGO)](https://data.humdata.org/dataset/cod-ps-mng). ## Where is Bayan-Olgii Aimag? Bayan-Olgii Aimag lies in [Mongolia](https://wherepedia.org/mongolia/). It borders 2 other aimags: [Khovd Aimag](https://wherepedia.org/mongolia/khovd/) and [Uvs Aimag](https://wherepedia.org/mongolia/uvs/). By area it is the 17th largest of 22 aimags in Mongolia. It covers 2.9% of [Mongolia](https://wherepedia.org/mongolia/). The centre of Bayan-Olgii Aimag is about 1,276 km in a straight line from Ulan Bator, the capital. The centre point is at 48.2764° N, 89.6803° E. Local names: Баян-Өлгий . Source: [National Statistical Office of Mongolia via OCHA HDX, administrative boundaries (COD-AB, CC BY-IGO)](https://data.humdata.org/dataset/cod-ab-mng). ## Soums of Bayan-Olgii Aimag Soum Area km² Localities Services [Altai](https://wherepedia.org/mongolia/bayan-olgii/altai/) 3,173 4 3 [Altanco'gc](https://wherepedia.org/mongolia/bayan-olgii/altanco-gc/) 1,801 4 1 [Bayannuur](https://wherepedia.org/mongolia/bayan-olgii/bayannuur/) 2,333 5 2 [Bugat](https://wherepedia.org/mongolia/bayan-olgii/bugat/) 2,038 1 1 [Bulgan](https://wherepedia.org/mongolia/bayan-olgii/bulgan/) 4,939 7 3 [Buyant](https://wherepedia.org/mongolia/bayan-olgii/buyant/) 1,833 2 2 [Cengel](https://wherepedia.org/mongolia/bayan-olgii/cengel/) 6,459 5 6 [Delu'un](https://wherepedia.org/mongolia/bayan-olgii/delu-un/) 5,627 4 2 [Nogoonnuur](https://wherepedia.org/mongolia/bayan-olgii/nogoonnuur/) 5,276 5 5 [O'lgii](https://wherepedia.org/mongolia/bayan-olgii/o-lgii/) 100 3 90 [Sagsai](https://wherepedia.org/mongolia/bayan-olgii/sagsai/) 3,199 2 1 [Tolbo](https://wherepedia.org/mongolia/bayan-olgii/tolbo/) 2,971 3 4 [Ulaanxus](https://wherepedia.org/mongolia/bayan-olgii/ulaanxus/) 6,006 11 8 Source: [National Statistical Office of Mongolia via OCHA HDX, administrative boundaries (COD-AB, CC BY-IGO)](https://data.humdata.org/dataset/cod-ab-mng); [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/); [Overture Maps places (CDLA-Permissive-2.0) and © OpenStreetMap contributors (ODbL)](https://overturemaps.org/). ## Villages and localities in Bayan-Olgii Aimag Open gazetteers list **56 villages, towns and localities** in Bayan-Olgii Aimag. The largest with a recorded population: Ölgii (28,400), Jargalant (5,137) and Tsagaannuur (200). Settlements here lie between about 1,333 m and 2,883 m above sea level (median 1,929 m). - Ak-aral - Altai - Altantsugts - Bardam bag - Bayan-Enger - Bayannuur - Bayanzunkh - Bazar Köl Suma - Beleu - Bilüü - Boro Burgaasa - Buga - Bugat - Bulgan - Buyant - Chihertey - Chzhirgalantu-Sagsay-Somon - Dalayhöl - Deluun - Duruu nuur bag - Hovd - Hujirt - Hurimiin Suma - Höshööt - Ikh-Oigor bag - Jargalant - Khar uul - Khash bag - Khoilik - Myangani - Nogoonnuur - Oygor - Oygur - Rashaant - Sagsai - Sunkhul bag - Suoku - Tarhatay - Taylag Suma - Tolbo - Tsagaan Tünheiin Hüryee - Tsagaan aral bag - Tsagaangol - Tsagaannuur - Tsagaantüngi - Tsengel - Tsengel Hayrhan Suma - Tsetseg bag - Tsjagaan-Gol - Tsul-Ulaan - Ulaan Khat - Ulaan khus bag - Ulaanbaishint - Ulaankhus - Uujim - Ölgii Source: [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/); [© OpenStreetMap contributors (ODbL), Geofabrik extract — named settlements](https://www.openstreetmap.org/copyright). ## Landscape and landmarks of Bayan-Olgii Aimag Named natural and historic features inside Bayan-Olgii Aimag, from the GeoNames gazetteer. ### Water 157 rivers and streams; 46 lakes. - Achit Nuur - Ak Su - Ak-Kokum - Angogrtey Gol - Asgat Bulagiyn Gol - Baga Chuluut Gol - Baga Davaatïn Gol - Baga Khatugiin Gol - Baga Khatugiin Nuur - Baga Oigor Gol - Baga Türgeniy Gol - Baleykey Bulag - Bardïn Gol - Baruun Salaa - Bayan Nuur - Bayan Nuur - Biluugiin Gol - Bilüü - Bor-Bugasny Gol - Bor-Burgas Gol - Bor-Burgas Gol - Bor-Burgasny - Bulag Gol - Burata …and 179 more. ### Hills and mountains 26 mountains; 22 mountain passes; 4 glaciers; 4 valleys; 1 peak. - Youyi Feng · 4,314 m - Alyöksandrïn Mösön Gol · 3,756 m - Tu-hsin-wu-la · 3,628 m - Möst Uul · 3,491 m - Prokhod Argamdzhi · 3,332 m - Potanin Glacier · 3,324 m - Shiveet Khairkhan Uul · 3,281 m - A-erh-shan-t’u-ta-fan · 3,276 m - Büürgeteyn Uula · 3,253 m - Üsügen Uul · 3,225 m - Hüyten Salaa Uul · 3,207 m - Granyögiyn Mösön Gol · 3,198 m - Ulaan Davaa · 3,191 m - Har Hüremiyn Uul · 3,176 m - Baga Salaa Uul · 3,169 m - Prjyövalĭskiyn Mösön Gol · 3,141 m - Sha-wu-chin-so-la-ta-fan · 3,064 m - Tsengel Hayrhan Uul · 3,063 m - Bulag Uul · 3,031 m - Tsagaan Uul · 3,018 m - Korumty Davaa · 3,008 m - Irmegteyn Uul · 2,938 m - Chia-le-ko-tzu-a-ka-hsi-ta-fan · 2,925 m - Tugreg · 2,906 m …and 33 more. ### History 6 ancient sites. - Akh Töbei - Aral Tolgoi - Khar Chuluut - Khargiin Khödöö - Sary Böktep - Shar Bulag ### Getting around 1 airport. - Ölgii Airport Source: [GeoNames (CC BY 4.0) — settlements, natural and historic features](https://www.geonames.org/). Places of worship are not listed. Elevations are from the GeoNames terrain model and are approximate. ## Weather in Bayan-Olgii Aimag and the best time to visit In Bayan-Olgii Aimag, the warmest month is Jul (average 11 °C) and the coolest is Jan (-22 °C). About 195 mm of rain falls in a year; the wettest month is Jul (38 mm) and the driest Feb (6 mm). The most comfortable months for a visit are **July**. - Jan - Feb - Mar - Apr - May - Jun - Jul - Aug - Sep - Oct - Nov - Dec Month Average °C Rain mm Jan -22 7 Feb -20 6 Mar -13 7 Apr -3 12 May 3 19 Jun 9 34 Jul 11 38 Aug 9 30 Sep 3 15 Oct -4 9 Nov -13 9 Dec -20 7 Source: [NASA POWER climatology, retrieved 2026-10-29](https://power.larc.nasa.gov/). ## Hospitals, banks and other services in Bayan-Olgii Aimag Places mapped inside Bayan-Olgii Aimag in open map data, by type — each number opens the full list with locations. - Hospitals5 - Banks23 - ATMs1 - Petrol pumps16 - Hotels28 - Shopping malls1 - Schools19 - Colleges and universities1 - Pharmacies2 - Restaurants25 - Police stations4 - Dental clinics3 Source: [Overture Maps places (CDLA-Permissive-2.0) and © OpenStreetMap contributors (ODbL)](https://overturemaps.org/). Coverage depends on what has been mapped; contact details are not shown. ## Quick answers - Where is Bayan-Olgii Aimag?In Mongolia - What is the population of Bayan-Olgii Aimag?103,003 (2021 estimate) - What is the median age in Bayan-Olgii Aimag?About 23 years (2021 estimate) - What is the population density of Bayan-Olgii Aimag?About 2 people per km² - What borders Bayan-Olgii Aimag?Khovd Aimag and Uvs Aimag - How many villages are in Bayan-Olgii Aimag?56 named settlements (GeoNames, OpenStreetMap) - What is the elevation of Bayan-Olgii Aimag?Settlements lie between 1,333 m and 2,883 m - What is the highest point in Bayan-Olgii Aimag?Youyi Feng (4,314 m, GeoNames elevation model) - What is the best time to visit Bayan-Olgii Aimag?July - How many hospitals are in Bayan-Olgii Aimag?5 mapped - How many banks are in Bayan-Olgii Aimag?23 mapped - How many ATMs are in Bayan-Olgii Aimag?1 mapped - How many petrol pumps are in Bayan-Olgii Aimag?16 mapped - What is the P-code of Bayan-Olgii Aimag?MN83 (OCHA common operational dataset)