The area of Yakutsk Oblast, according to the calculations of Ivan Strelbitsky, was 3,489,689 square versts (about 368 million dessiatinas).

According to the 'Institution for the Administration of the Siberian Provinces,' approved in 1822, the Yakutsk Oblast was divided into five uezds: Verkhoyansk, Vilyuisky, Olekminsky, Srednekolymsky, and Yakutsky.

On 20 April 1920, by decision of the Siberian Revolutionary Committee (Sibrevkom), the Yakutsk Oblast was annexed to the Irkutsk Governorate as a special region.

The coat of arms of the Yakutsk Oblast, created based on a reworking of the city coat of arms of Yakutsk, was approved by Emperor Alexander II on 5 July 1878: 'In a silver shield, a black eagle holding a scarlet sable in its claws.

The shield is decorated with the Ancient Royal Crown and surrounded by golden oak leaves connected by the Alexander Ribbon.'

There were 256,737 Orthodox Christians, 193 Catholics, 2 Armenian-Apostolic, 23 Protestants, 1,731 schismatics and sectarians (including 1,240 Old Believers), 510 Jews, 1,896 Muslims, and 1,610 adherents of traditional beliefs.

The Russians who lived on the Olenka, Yana, Aldan, Indigirka, and Kolyma rivers almost isolated themselves, partly forgot their language, and changed their way of life.

The Skoptsy brought considerable benefit to the local population and the entire region, developing agricultural knowledge in it.

Unlike the Yakuts, other local residents such as Tungus (Evenks), Evens, Yukaghirs, and Chuvans belong to Mongolic tribes.