Sergey Yurievich Ten (Russian: Сергей Юрьевич Тен; born 25 August 1976, Irkutsk) is a Russian political figure and a deputy of the 6th, 7th, and 8th State Dumas.

[1] From 1999 to 2001, Ten worked as Deputy General Director for Property and Strategic Development of Trud CJSC.

From 2006 to 2009, Ten was the Head of the Irkutsk branch of the Young Guard of United Russia.

In 2011, 2016, and 2021, he was elected deputy of the 6th, 7th, and 8th State Dumas from the Irkutsk Oblast constituency, respectively.

[1][2][3] He was sanctioned by Canada under the Special Economic Measures Act (S.C. 1992, c. 17) in relation to the Russian invasion of Ukraine for Grave Breach of International Peace and Security,[4] and by the UK government in 2022 in relation to Russo-Ukrainian War.