Full Breakdown
South Korea’s Democratic Party Wins Nationwide Local Sweep but Loses Seoul Mayoral Race
6/5/2026, 3:09:32 AM
Election Outcomes: Nationwide Sweep and Seoul Defeat
On 3 June 2026 South Korea held local elections for 16 mayoral and gubernatorial posts and 14 parliamentary by-election seats. The ruling Democratic Party (DP) secured 12 of the 16 major local offices, while the opposition People Power Party (PPP) retained the mayoralty of Seoul and three other posts. In Seoul, incumbent PPP mayor Oh Se-hoon narrowly defeated DP challenger Chong Won-o.
Political Background: From Martial-Law Crisis to Lee’s Presidency
Former President Yoon Suk-Yeol’s attempt to impose martial law in December 2024 led to his impeachment, removal from office and a life-imprisonment sentence for insurrection. President Lee Jae Myung, elected in a snap presidential vote in June 2025, entered his first year with a parliamentary majority and high approval (?60 %). The local elections were widely viewed as a referendum on Lee’s administration and on the PPP’s ability to recover from the 2024 crisis.
Main Actors
- Lee Jae Myung – President, leader of the DP.
- Democratic Party (DP) – Governing party, holds the presidency and a parliamentary majority.
- People Power Party (PPP) – Main conservative opposition.
- Oh Se-hoon – Incumbent mayor of Seoul (PPP).
- Chong Won-o – DP mayoral candidate for Seoul.
- Han Dong-hoon – Former PPP leader, elected as an independent in a Busan parliamentary by-election.
- National Election Commission (NEC) – Election-administration authority.
Election Numbers
- DP won 12 of 16 mayoral/gubernatorial contests (including Busan, Gyeonggi, Incheon).
- PPP won the remaining 4 contests (Seoul, Daegu, South Gyeongsang, North Gyeongsang).
- In the Seoul mayoral race, Oh Se-hoon received 49.07 % of votes to Chong’s 48.21 % (99 % of ballots counted). A separate source reported 49.15 % vs 48.13 %.
- DP captured 9 of 14 parliamentary by-election seats; PPP secured 4, with one independent win.
- Ballot shortages occurred at 14 Seoul polling stations, prompting extended voting hours at several sites.
Implications for Governance
The DP’s expanded local control strengthens President Lee’s capacity to coordinate national policies, especially those tied to the AI-chip export boom and fiscal reforms. However, the loss of Seoul—South Korea’s political and economic hub—signals voter concern over housing affordability and suggests limits to the DP’s urban appeal. The PPP’s hold on Seoul provides a platform for opposition scrutiny and potential conservative resurgence in future national contests.
Official Statements & Responses
- Oh Se-hoon framed his victory as a safeguard against partisan dominance, emphasizing democratic checks and balances.
- President Lee pledged to “humbly accept the will of the people” and to cooperate with all newly elected local officials.
- The NEC issued an apology for ballot shortages, announced a full investigation, and rejected calls for a revote.
- PPP leader Jang Dong-hyeok expressed disappointment and apologized for the party’s overall performance while criticizing the ballot-paper mishap.
Criticism & Opposition
Analysts linked the Seoul outcome to persistent housing-price pressures, noting that residents “are particularly sensitive to housing issues” and used the mayoral race to check the Lee administration. Political scientists warned that the PPP’s remaining base is increasingly confined to hard-line supporters, narrowing its ideological space.
On-the-Ground Issues: Ballot Shortages
Voters at multiple Seoul stations faced paper-ballot shortages, leading to temporary suspensions, protests, and extended voting until 10 p.m. in some wards. The incident sparked accusations of electoral mismanagement from both parties.
Conflicting Reports & Gaps
- Exit polls initially projected a DP win in Seoul, while final counts confirmed a PPP victory.
- Reported vote shares for the Seoul race differ by up to 0.02 percentage points across sources.
- No official determination has been made regarding the impact of the ballot shortage on the final result.
Verbatim Quotes
- “Seoul citizens have once again firmly established the fundamental principle of democracy: checks and balances,” — Oh Se-hoon, Mayor of Seoul
- “This election is a victory for common sense,” — Oh Se-hoon, Mayor of Seoul
- “The People Power Party camp is increasingly left with only its most hardline supporters, and the ideological territory they occupy is becoming ever narrower,” — Kim Joonil, political analyst
- “every election is ultimately a referendum on the ruling party.” — Shin Yul, political science professor, Myongji University
- “I’ll rebuild the conservatives, rein in the Lee Jae Myung government’s overreach and restore balance in the Republic of Korea,” — Han Dong-hoon, independent candidate (former PPP leader)
- “humbly accept the will of the people” — Lee Jae Myung, President of South Korea
Looking Ahead
The NEC’s investigation into ballot shortages will conclude in the coming weeks, potentially influencing public confidence ahead of the 2028 parliamentary elections. Both Oh Se-hoon and Han Dong-hoon have hinted at future presidential ambitions, suggesting that the Seoul outcome may shape the strategic calculus of South Korea’s major parties.
