The dynamics of metropolisation in the Republic of Sakha (Yakutia) in the context of the post-soviet geo-demographic processes, globalisation, territorial integration and global warming are analyzed in the article. These processes are characterised with the emergence of an urban region centred on Yakutsk. The decreasing of population is driving by the economic changes, the lifestyle evolutions of the society, and rural migrations to urban centres. They are impacting the population balances and generating new spatial demographic repartitions.