Bučiūnai (formerly Russian: Бучуны, Polish: Buczuny) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village had a population of 18 people. It is located 2.5 kilometres (1.6 mi) from Labūnava, by the Kėdainiai-Babtai road, nearby the Nevėžis river, by its tributary the Šakupulis.