Kyakhta (Russian: Кя́хта, [ˈkʲæxtə]; Buryat: Хяагта, romanized: Khiaagta, [ˈçæːχtə]; Mongolian: Хиагт, romanized: Hiagt, [ˈçæχtʰ]) is a town and the administrative center of Kyakhtinsky District in the Republic of Buryatia, Russia, located on the Kyakhta River near the Mongolia–Russia border.

Kyakhta's founder, the Serb Sava Vladislavich, established it as a trading point between Russia and the Qing Empire.

[14] Kyakhta was crowded, unclean, ill-planned, and never came to reflect the wealth that flowed through it,[15] although several Neoclassical buildings were erected in the 19th century, including a tea bourse (1842) and the Orthodox cathedral (1807–1817), both of which still stand.

[16] It was from Kyakhta that Nikolay Przhevalsky, Grigory Potanin, Pyotr Kozlov, and Vladimir Obruchev set off on their expeditions into the interior of Mongolia and Xinjiang.

[17] After the entire Russian-Chinese frontier was opened to trade in 1860 and the Trans-Siberian and the Chinese Eastern Railways bypassed it, Kyakhta fell into decline.

In the mid-20th century, a branch railway was built from Ulan-Ude (on the Trans-Siberian) to Mongolia's Ulan Bator, and, eventually, to China, paralleling the old Kyakhta trade route.

[1] As an administrative division, it is, together with one rural locality (the settlement of Sudzha), incorporated within Kyakhtinsky District as the Town of Kyakhta.

"North Kyakhta"); Altanbulag (then, Maimaicheng) across the border was Өвөр Хиагт (Övör Khiagt, lit.