The 7th local elections were held in South Korea on 13 June 2018. The election coincided with the by-elections for the vacant seats in the National Assembly. The election was a landslide victory for the Democratic Party of Korea, the ruling party, after two successful summits with the third inter-Korean summit on 27 April and the first North Korea-United States summit in Singapore on 12 June.
A total of 17 metropolitan mayors and governors were elected.
Bold indicates that a candidate won as metropolitan mayor or governor.
Bold indicates an incumbent who was re-elected.
A total of 824 metropolitan and provincial councillors were elected.
A total of 226 municipal mayors (municipal city, county, autonomous district) were elected.
A total of 2,926 municipal councillors (municipal city, county, autonomous district) were elected.