Dobong B

Since its establishment, Dobong B has more often voted for centre-left, liberal parties to represent the constituency and is thus considered a stronghold for the Democratic Party.^[1][2]

Sul Hoon of the centrist-liberal National Congress for New Politics was the first member to represent the constituency, having narrowly beat out Paik Young-ki of the centre-right Grand National Party.^[3] Sul won re-election in 2000, once again defeating Paik.^[4] However, Sul did not run for re-election in 2004 after being indicted on falsely claiming that then presidential candidate Lee Hoi-chang had received $200,000 from businessman Choi Kyu-sun.^[5][6] Sul was succeeded by Yoo Ihn-tae of the liberal Uri Party, receiving 47.37% of the vote.^[7] Yoo unsuccessfully ran for re-election in 2008 and was defeated by Kim Seon-dong of the Grand National Party.^[8] A return match between Yoo and Kim was held in 2012 which saw Yoo win back the seat.^[9] Ahead of the 2016 South Korean legislative election, the Democratic Party "cut-off" Yoo from re-nomination, instead nominating lawyer Oh Gi-hyoung for the constituency.^[10] Kim Seon-dong of the conservative Saenuri Party emerged victorious in a three-way race which saw vote splitting between the Democratic Party and the newly formed centrist People Party.^[11][12] In the following election, Oh Gi-hyoung defeated Kim by a margin of more than seven points, winning back the seat for Democratic Party.^[13] Oh won re-election in 2024, garnering 52.83% of the vote and defeated People Power Party challenger Kim Seon-dong in a one-on-one match.^[14][15]

The constituency encompasses the neighborhoods of Ssangmun 2-dong, Ssangmun 4-dong, Banghak-dong, and Dobong-dong. The constituency borders Uijeongbu A to the north, Dongducheon–Yangju–Yeoncheon A to the northwest, Gangbuk A to the west, Dobong A to the south, and Nowon B to the east.^{[citation needed]}