Over 1 million invalid votes cast in South Korea's superintendent elections

South Korea's recent provincial superintendent elections saw an overwhelming 1.08 million invalid votes, accounting for 4.0% of the total ballots cast. This figure significantly surpasses the 1.6% invalid vote rate recorded in the concurrent provincial governor elections and marks an increase from the 903,249 invalid votes in the 2022 superintendent elections.

The high number of invalid votes is particularly pronounced in Seoul, the most populous region, where 305,030 invalid votes were recorded, translating to an invalid vote rate of 5.69%. This rate is more than five times higher than that of the Seoul mayoral election held the same day. The Seoul superintendent race featured the largest number of candidates nationwide, with eight individuals running, partly due to some candidates refusing to unify their campaigns.

Even in regions with only two candidates, the issue persisted. The Jeonbuk superintendent election, a two-way race, recorded 52,719 invalid votes (5.57% invalid rate), the second-highest after Seoul. This is attributed to the candidates being from the same progressive faction, leading to unclear distinctions for voters. In several areas, the number of invalid votes exceeded the margin between the top two candidates. For instance, in the closely contested Gyeongnam superintendent election, the 71,655 invalid votes were ten times the 7,165 vote difference between the winner and the runner-up.

Furthermore, a significant number of elected superintendents secured less than 50% of the vote. Out of the 16 elected superintendents, 12 won with less than half the votes cast, a stark contrast to the provincial governor elections where only two candidates achieved this. The lowest winning percentage was in Daejeon, where the elected superintendent garnered only 27.5% of the vote. The newly elected Seoul superintendent secured 30.3%, the lowest for a Seoul superintendent in history.

Analysts attribute the high volume of invalid votes to the inherent structure of superintendent elections, which lack party nominations. This "dark horse" system, where only candidate names appear on the ballot without party affiliations, provides voters with insufficient information for decision-making. The situation was further complicated in this election by internal disputes leading to candidate fragmentation and a focus on ideological debates and negative campaigning, which reportedly diminished voter interest and engagement.