Leaked Rosstat data shows over 450,000 Russians killed in Ukraine war

Leaked demographic data from Russia's statistics agency Rosstat, obtained by hacker groups Belarusian Cyberpartisans and Silent Crow, reveals between 393,881 and 450,100 Russian war-related deaths in Ukraine since February 2022. While Rosstat denies any data breach, independent outlets Mediazona and BBC Russian have confirmed at least 285,881 casualties. Analyst Janis Kluge notes that despite minimal economic impact, the losses carry profound political significance.

Casualty figures in the leaked Rosstat data

• ▪Silent Crow calculated a total of up to 450,100 war-related Russian deaths by including non-combat military fatalities, killed civilians, and deaths recorded without a specified cause between February 2022 and August 2026
• ▪Belarusian Cyberpartisans estimated at least 393,881 deaths from the leaked Rosstat database by exclusively counting records explicitly identifying military operations, combat, or long-term effects of fighting as the cause
• ▪Leaked Rosstat records indicated that over 450,000 Russians have been killed in the Ukraine war, making it the fourth most common cause of death in Russia since 2022

Regional breakdown and territorial cost of losses

• ▪Silent Crow's casualty estimate of up to 450,100 deaths against the 73,000 square kilometers gained by Russia amounts to approximately six Russian deaths for every square kilometer of Ukrainian territory seized since February 2022
• ▪Seventy-two percent of the registered Russian military deaths in the leaked Rosstat dataset occurred in the Donetsk People's Republic, including over 20,000 killed in the Battle of Bakhmut

Demographic and political impact of casualties

• ▪Janis Kluge of the German Institute for International and Security Affairs stated that the leaked death toll of around 450,000 represents roughly half a percent of Russia's 80 million working-age population
• ▪Janis Kluge stated that the main significance of the high casualty rate is political, challenging claims of Russian victory given the rate of population loss

Rosstat cyberattack and official response

• ▪Rosstat acknowledged experiencing cyberattacks between October 29 and November 1, 2026, but denied that its databases had been compromised or that information had been leaked
• ▪Following the cyberattack between October 29 and November 1, 2026, Rosstat reported disruptions to its services and extended deadlines for submitting statistical data
• ▪Hacker groups Belarusian Cyberpartisans and Silent Crow launched a cyberattack targeting Rosstat's IT infrastructure between October 29 and November 1, 2026

Independent casualty tracking and official secrecy

• ▪The Russian government has not officially disclosed its battlefield casualty figures since September 2022 and has dismissed independent estimates of war losses as unreliable
• ▪Mediazona and BBC Russian verified 285,881 Russian military personnel killed in Ukraine as of November 6, 2026, using open-source research from public records