Korean Polls Miss June 3 Results by Up to 5.4 Points, Fueling Industry Doubts

3 articles · Updated · The Korea JoongAng Daily · Jun 4

Seoul’s mayoral race crystallized the polling failure: exit polls put Democratic Party candidate Chong Won-o at 51.4% and Oh Se-hoon at 46%, but Oh won with 49.15% to 48.13%.
Similar misses hit other close races, including South Gyeongsang governor and Pyeongtaek-B, where pre-election surveys showed Yu Eui-dong trailing before he won with 34.83%.
Analysts said forecasts broke down because early-voting behavior shifted, conservative voters increasingly avoided surveys and exit polls, and response rates in some areas were too low to capture local sentiment.
Methodological limits also surfaced: exit polls cannot be conducted during early voting, forcing pollsters to model those ballots, while demographic weighting based on resident data can diverge from actual turnout.
The repeated errors have triggered calls to overhaul how Korean pollsters measure public opinion, with experts warning polls may now distort races as much as they reflect them.

Sources

The Korea JoongAng Daily22h ago

Korean Exit Polls, Surveys Miss June 3 Election Results, Sparking Accuracy Doubts

en.sedaily.com22h ago

Korea's Exit Polls Miss Again in Local Elections - Seoul Economic Daily

조선일보22h ago

Exit Polls Miss Key South Korea Races

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Exit Poll Disasters and Early Voting Surge: Analyzing South Korea’s June 3, 2026 Local Election Results

Overview

The June 3, 2026, nationwide local elections in South Korea saw the Democratic Party of Korea win most local government head positions, while the People Power Party held key areas in the Seoul metropolitan region, maintaining a strong political presence. However, the election was marked by major discrepancies between pre-election surveys and actual results, especially in close races like Gyeonggi's Hanam-A constituency, where polls predicted a clear Democratic lead but the final margin was much narrower. These unexpected differences highlighted challenges in accurately forecasting voter sentiment and raised questions about the reliability of polling methods.

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