Selenge () is one of the 21 aimags (provinces) of Mongolia, located in the north of the country, directly bordering Russia. It lies in the broad, fertile river basins of the Selenge and Orkhon rivers, which are among Mongolia's most important waterways. The name is derived from the Selenge river. The capital is Sükhbaatar.
The province of Darkhan-Uul, and its capital Darkhan, is an enclave inside Selenge.
In 1994, a portion of its area was taken out to form the Darkhan-Uul Province.
The province covers roughly ~41,000 kmò, with a landscape dominated by forest-steppe plains, rolling hills, and river basins. Elevations typically range between ~800 â 1,200 m above sea level in the major valleys.https://legendtour.mn/mongolia/regions/selenge-aimag.shtml?
The province has a total forest area of 19,000 km<sup>2</sup>.
<sup>*</sup> The aimag capital Sükhbaatar.
In 2018, the province contributed to 2.12% of the total national GDP of Mongolia.