Leaked Data Suggests Over 400,000 Russians Killed in Ukraine War

Newly leaked data from Russia's state statistics agency, Rosstat, suggests that more than 400,000 Russians have been killed fighting in Ukraine since Moscow launched its full-scale invasion nearly five years ago. This development brings new clarity to the ongoing russians ukraine conflict as researchers analyze the massive dataset.

The hacked records were obtained by the Belarusian opposition-linked hacker group Cyber Partisans and the Ukrainian hacking collective Silent Crow. The leaked files include over 11 million death certificates detailing the age, residence, and location of the deceased. Out of this total, 412,576 death certificates explicitly tied fatalities to the war through official cause-of-death codes or written references to military operations.

Rosstat confirmed the breach but denied that sensitive information had been compromised. While independent verification of the entire dataset remains difficult, experts note the figures align broadly with other estimates. British intelligence previously estimated around 500,000 Russian deaths, while the independent outlet Mediazona has identified nearly 286,000 names by cross-referencing official records and public obituaries.

Janis Kluge of the German Institute for International and Security Affairs described the leak as the largest ever recorded for Russian casualties. Kluge noted that due to processing delays and missing personnel, the actual death toll is likely closer to 500,000. He also highlighted a sharp surge in battlefield fatalities during late 2024 and 2025, with monthly deaths exceeding 15,000 in several periods.

Leaked death records indicate more than 400,000 Russian military fatalities in the Ukraine war.

The data further illustrates a stark geographic disparity in war losses across Russia. Poorer and more remote areas, such as Buryatia, Tuva, and Zabaykalsky Krai, experienced war fatalities accounting for roughly a third of all deaths among men aged 18 to 49 between the invasion's start and mid-2024. In contrast, the figure for Moscow and St Petersburg was about 10%.

Why it matters

These findings shed unprecedented light on the heavy human cost of the ongoing war, providing concrete figures on casualties that the Russian government has treated as a state secret. Despite the staggering death toll and upcoming peace talks in Abu Dhabi, analysts suggest the massive losses may harden President Vladimir Putin's resolve rather than push Moscow toward a settlement.