Darkhan (/ˈdɑːrkɑːn/, UK also /ˈdɑːrhæn/; Mongolian: Дархан, [ˈtarχɴ̩]) is the third-largest city in Mongolia and the capital of Darkhan-Uul Aimag.

[citation needed] With an elevation of 665 metres or 2,182 feet, Darkhan is the capital of the Darkhan-Uul Province.

It is a city with notable Soviet influence, evidenced by the huge square buildings and heavy Cyrillic usage.

These three climate types tend to overlap a good deal over the border regions of Mongolia, Russia and Kazakhstan.

The city has a monument to the horse-head fiddle (morin khuur), the national emblematic instrument of Mongols.

Waste water is treated at the Darkhan Wastewater Treatment Plant before being discharged to the nearby river.