Russian Bloc (Ukrainian: Руський блок, romanized: Ruskyi blok; Russian: Русский блок, romanized: Russky blok) is a currently (since 13 May 2014) banned political party in Ukraine that was registered in March 2001.^[1][2]

The party associates itself with the Russian Federation and employs the Russian tricolor. It promotes the idea of a united, Pan-East-Slavic state. The former name of the party is the Party For One Rus' (Ukrainian: За Русь єдину, Russian: За Русь единую).^[2]

The history of the party began with the creation in June 1999 of the "Russian Movement of Ukraine".^[1] It was formally registered as a political party in March 2001^[1] under the name "For One Rus".^[2]

During the 2002 Ukrainian parliamentary election the party (still called "For One Rus'") was part of the Russian Bloc that got 0.73% of the votes and no seats.^[2] It did not participate in National elections until 2012.^[2] In the Verkhovna Rada of Crimea the party was represented after the 2006 Crimean parliamentary election as it is part of the Crimean political alliance "For Yanukovych!" with the Party of Regions.^[3] In the 2010 Crimean parliamentary election the Party of Regions and the Russian Bloc run separately.^[4][5] During this election the party won representatives in municipalities and did particularly well in Sevastopol.^[6] In the 2012 Ukrainian parliamentary election the party won 0.31% of the national votes and no constituencies (it had competed in 10 constituencies^[7]) and thus failed to win parliamentary representation.^[8] The parties best results were in constituency 233 (in Sevastopol) with 27.80%, constituency 223 (in Kyiv) with 8.22% and in constituency 43 (in Donetsk) with 4.23% of the votes.^[7]