President Lee Jae Myung's ruling Democratic Party won a majority of seats [1] in South Korea's local elections on June 4, 2026.

The results serve as a critical performance review for the liberal government one year into the president's term. By securing a nationwide sweep, the administration gains a stronger mandate to pursue its legislative agenda and domestic policy goals.

Voters across the country used the local contests to gauge their support for the administration [2]. According to Arirang News, voter turnout for these elections was the second-highest on record [3].

While the Democratic Party dominated most regions, the outcome in the capital remains a point of contention. Some reports indicate the ruling party may lose control of Seoul [1], despite the broader nationwide victory.

The elections took place in major cities, including Seoul and Busan, where the balance of power often influences national political momentum [1]. The sweep suggests that the public generally approves of the direction Lee has taken since assuming office.

Political analysts view the majority win as a sign of stability for the current government. The Democratic Party's ability to maintain control over most local jurisdictions allows for more seamless coordination between the central government and regional authorities.

The Democratic Party swept the majority of seats in the local elections

The Democratic Party's victory solidifies President Lee Jae Myung's political position, reducing the likelihood of legislative gridlock. However, a potential loss in Seoul would signal a geographic divide in support, suggesting that urban voters in the capital may be more critical of the administration's policies than the general national population.