Bulgaria (Russian: Булга́рия, tr. Bulgariya) was a class 785/OL800 Russian river cruise ship (built in Komárno, Czechoslovakia) which operated in the Volga-Don basin. On 10 July 2011, Bulgaria sank in the Kuybyshev Reservoir of the Volga River near Syukeyevo, Kamsko-Ustyinsky District, Tatarstan, Russia, with 201 passengers and crew aboard when sailing from the town of Bolgar to the regional capital, Kazan. The catastrophe led to 122 confirmed deaths (bodies recovered and identified).
The sinking of Bulgaria is the largest Russian ship disaster since 1986 when the SS Admiral Nakhimov crashed into a cargo ship and 423 people died.
Bulgaria was built at Slovak shipyard in Komárno, Czechoslovakia, in 1955 as Ukraina, and was renamed in February 2010 to Bulgaria after the Volga Bulgaria. Her length was 80.2 metres (263 ft), her beam was 12.5 metres (41 ft), her draft was 1.9 metres (6.2 ft), and her power output was 273 kilowatts (366 hp). She had two engines and two decks. Her cruising speed was 20.5 kilometres per hour (12.7 mph; 11.1 kn), and her original passenger capacity was 233 (then reduced after overhaul).