Short answers, pulled from the story.
Russia's 2021 census recorded a provisional population of approximately 147.2 million people, measured as of the 1st of October 2021. That represented a 1.4% increase from 2010. Urban residents made up 74.8% of the total, compared to 73.5% in 2010.
The 2021 Russian census was originally planned for 2020, as reflected in a government decree adopted in 2017 titled "On the conduct of the Russian Population Census 2020." COVID-19 forced two successive postponements, first to April 2021 and then to October 2021.
The Levada Center described the 2021 Russian census results as "one of the worst in 150 years" and estimated that around 42% of the population was never enumerated. Rosstat maintained a 99% completion rate, directly contradicting the Levada Center's assessment.
Russians are the largest ethnic group, numbering 105,620,179 and making up 71.76% of the total population in the 2021 census. Tatars are the second largest group at approximately 4.7 million, or 3.2% of the population. Around 17.1 million people, or 11.64% of respondents, did not declare an ethnicity.
The Volga Federal District fell to 96.8% of its 2010 population in the 2021 Russian census, the Far Eastern Federal District to 95.3%, and the Siberian Federal District to 97.8%. By contrast, Moscow grew by 10.8% and St. Petersburg by 14.8%.
The 2021 Russian census was the first national count to allow self-enumeration through the Gosuslugi public services portal, which accepted submissions through November 8. The 2018 pilot census had already made Russian Post part of a census enumeration for the first time in Russian history, with nearly 460,000 households counted electronically.