On the day of national unity, I saw many publicists, even those in power, disagree about how many nationalities live in Russia. The numbers were called 195, 642, etc.
And even, I repeat, none of the government experts bothered to go to the Rostat website and see how many nationalities he officially registered as living in Russia - the last census revealed them. There are officially 1654 nationalities in Russia. I specifically made a screenshot of the last nationalities in this list from Rostat's Excel file (the list of nationalities starts in column 4, so we need to subtract 4 from 1658 and we get 1654 nationalities). But as we see from the screenshot, almost 110 thousand additional Russians turned out to be of the same nationality that were not included in the official list.
Rostat was criticized for this by many specialized institutions. For example, the Institute of Ethnology and Anthropology of the Russian Academy of Sciences offered its own list, which included more than 2,000. nationalities Also, over time, Russia is becoming more and more multinational. In the 2002 census there were only 869 official nationalities. And now there are 1654 official nationalities, so you should use that figure.