Sergei Adamovich Kovalyov (also spelled Sergey Kovalev; Russian: Сергей Адамович Ковалёв; 2 March 1930 – 9 August 2021) was a Russian human rights activist and politician. He was a dissident and political prisoner in the Soviet era. He was a critic of Vladimir Putin and his government. From 1993 until 2003, Kovalev was a member of the State Duma. Kovalev was born in Seredyna-Buda, Soviet Union.
Kovalev died on 9 August 2021 in Moscow, aged 91.