Parliamentary elections were held in Ukraine on 28 October 2012. Because of various reasons, including the "impossibility of announcing election results" various by-elections have taken place since. Hence, several constituencies have been left unrepresented at various times.
Unlike the two previous elections, this election used a parallel voting system, with half the seats elected by party-list proportional representation using a 5% election threshold and the other half by first-past-the-post voting in single-member constituencies, with alliances no longer allowed. The parallel voting system was used previously in 1998 and 2002.