Nizhneangarsk (Russian: Нижнеанга́рск; Russian Buryat: Доодо Ангар, Doodo Angar; Mongolian: Доод Ангар, Dood Angar) is an urban locality (an urban-type settlement) and the administrative center of Severo-Baykalsky District of the Republic of Buryatia, Russia, located at the northern tip of Lake Baikal, 23 kilometers (14 mi) north of Severobaykalsk.

[2] It was founded in 1643 by the Russian explorer Semyon Skorokhod and was originally called Verkhneangarsk (Верхнеанга́рск), after the fort built here by Vasily Kolesnik in 1646.

[citation needed] In the 1970s, it was planned to make Nizhneangarsk the headquarters of the western end of the Baikal–Amur Mainline, but the marshy ground made it hard to build large buildings, so the headquarters were moved south to Severobaykalsk.

The town is also served by the Baikal–Amur Mainline that connects Nizhneangarsk with Severobaikalsk and Tayshet by railway.

Precipitation is moderate and is significantly higher in summer than at other times of the year.