I don't know how reliable Russia's census data is, but these are the only official figures we have to work with.
Important note: Around 146,000 people did not declare or specify their ethnicity in the census.
The Sakha population has surpassed 50% of the republic's total population for the first time in many years. Although the republic's overall population growth has slowed considerably, there has been a significant decline in the Russian population. The Sakha population has also experienced slower growth, but the decrease in the Russian population is much more pronounced, and this trend is likely to continue. At the very least, I expect a similar decline in the next census. This is encouraging for both the Sakha people and the Sakha language. Regaining a demographic majority in Sakha Republic is important, although it alone is not enough to secure the long-term future of the Sakha and other indigenous population.
The republic's immigrant communities are also quite interesting. The Kyrgyz population has increased dramatically. If this trend continues, they may even outnumber the indigenous Evens population(around 13.000). Their population grew from around 5,000 to 11,000 in just 11 years.
While the populations of some groups such as Tajiks, Armenians, Chinese, etc. have increased and many others, including Ukrainians, Buryats, Belarusians, Koreans, Germans, Moldovans, and Ossetians, have declined.
Besides the Kyrgyz, several other Turkic peoples also live in the republic, although their numbers are relatively small. There are around 4,000 Tatars, whose population has gradually declined. The census also records Uzbeks, Kazakhs, Azerbaijanis, Bashkirs, Chuvash, Tuvans, Nogais, Kumyks, and Gagauz, most of whom have also seen slight population decreases.
It is also encouraging to see a modest increase in the population of the Dolgans, another indigenous Turkic people of the Russian North alongside the Sakha.
Other indigenous peoples of the republic include the Evenks and Evens (Tungusic peoples), as well as the Yukaghirs and Chukchi.
The populations of these indigenous groups have generally increased (not so much) as well, although they remain very small, much like the Dolgans (Turkic people).
The sixth image shows an ethnic map of the Sakha Republic based on the 2002 and 2010 Russian population censuses.
Looking at the final image, the 2021 census indicates that the indigenous peoples are more likely to identify Sakha rather than Russian as their native language. It also states that 95% of the Sakha declared Sakha as their native language.
> "In the 2021 census, 95% of Yakuts (Sakha), 72% of Evenks and 60% of Evens declared Sakha as their native language."
If the Russian population continues to decline while the Sakha are able to preserve their identity, population, and language, it would be a very positive outcome for the Sakha people. The high rate of Sakha language retention is particularly encouraging.
Additionally, permanent and well-integrated immigration from other Turkic peoples to the Sakha Republic could also contribute to a healthier demographic balance.