새누리당
Opinion polls from prior to the election had suggested the Saenuri Party would win the election outright, and were confounded by Saenuri underperformance in constituencies and the comparative success of the Democratic and People's parties. The KBS exit poll on 13 April showed the Saenuri Party winning a plurality with between 121 and 143 seats, and the Democratic Party taking 101–123; other exit polls projected similar results. South Korean law had prohibited the publication of opinion polls in the week before the elections, beginning on 7 April.