The longest river in Russia as of 2020 was the Lena River located in the East Siberia, whose length was measured at *** thousand kilometers. The Irtysh River, flowing through Russia, China, and Kazakhstan, was *** kilometers shorter, ranking second.
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Ministry of Natural Resources and Environment of the Russian Federation. (December 13, 2021). Longest rivers in Russia as of 2020, by length (in 1,000 kilometers) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 27, 2026, from /statistics/1048091/longest-rivers-in-russia-by-length/
Ministry of Natural Resources and Environment of the Russian Federation. "Longest rivers in Russia as of 2020, by length (in 1,000 kilometers)." Chart. December 13, 2021. ÌÇÐÄÆƽâ°æ. Accessed July 27, 2026. /statistics/1048091/longest-rivers-in-russia-by-length/
Ministry of Natural Resources and Environment of the Russian Federation. (2021). Longest rivers in Russia as of 2020, by length (in 1,000 kilometers). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 27, 2026. /statistics/1048091/longest-rivers-in-russia-by-length/
Ministry of Natural Resources and Environment of the Russian Federation. "Longest Rivers in Russia as of 2020, by Length (in 1,000 Kilometers)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 13 Dec 2021, /statistics/1048091/longest-rivers-in-russia-by-length/
Ministry of Natural Resources and Environment of the Russian Federation, Longest rivers in Russia as of 2020, by length (in 1,000 kilometers) ÌÇÐÄÆƽâ°æ, /statistics/1048091/longest-rivers-in-russia-by-length/ (last visited July 27, 2026)
Longest rivers in Russia as of 2020, by length (in 1,000 kilometers) [Graph], Ministry of Natural Resources and Environment of the Russian Federation, December 13, 2021. [Online]. Available: /statistics/1048091/longest-rivers-in-russia-by-length/
