Tuldun Тулдун
Settlement
Tuldun Show map of Republic of Buryatia Tuldun Show map of Russia
Coordinates: 52°41′N 111°34′E / 52.683°N 111.567°E / 52.683; 111.567[1]
Country	Russia
Region	Republic of Buryatia
District	Yeravninsky District
Time zone	UTC+8:00

Tuldun (Russian: Тулдун) is a rural locality (a settlement) and the administrative centre of Tuldunskoye Rural Settlement, Yeravninsky District, Republic of Buryatia, Russia. The population was 471 as of 2017.^[2] There are 13 streets.

Tuldun is located 22 km north of Sosnovo-Ozerskoye (the district's administrative centre) by road, Shiringa is the nearest rural locality,^[3] near the Maly Yeravna lake, part of the Yeravna-Khorga Lake System.^[4]