2018 South Korean local elections
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.
Metropolitan mayors and governors
A total of 17 metropolitan mayors and governors were elected.Candidates
Bold indicates that a candidate won as metropolitan mayor or governor.| Metropolitan city/province | Others | |||||
| Seoul | Park Won-soon | Kim Moon-soo | Ahn Cheol-soo | Kim Jong-min | Kim Jin-sook In Jie-yeun Sin Jie-ye | |
| Busan | Oh Keo-don | Suh Byung-soo | Park Joo-mi | |||
| Daegu | Kwon Young-jin | Kim hyung-gi | ||||
| Incheon | Park Nam-chun | Kim Eung-ho | ||||
| Gwangju | Lee Yong-seop | Jeon Duk-young | Na Gyung-che | Yoon Min-ho | ||
| Daejeon | Heo Tae-jeong | Kim Yoon-gi | ||||
| Ulsan | Song Cheol-ho | Kim Ki-hyun | Lee Young-hee | |||
| Sejong | Lee Choon-hee | Song Ae-yong | Hu Chul-hue | |||
| Gyeonggi | Lee Jae-myung | Nam Kyung-pil | Kim Yung-hwan | Lee Hong-ue | Hong Seong-gyu | |
| Gangwon | Choi Moon-soon | |||||
| North Chungcheong | Lee Si-jong | Shin Yong-han | ||||
| South Chungcheong | Yang Seung-jo | Lee In-je | ||||
| North Jeolla | Song Ha-jin | Shin Jae-bong | Im Jung-yeop | Kwon Tae-hong | Lee Kwang-seok | |
| South Jeolla | Kim Yung-rok | Park Mae-ho | Min Young-sam | Noh Hyung-tae | Lee Sung-soo | |
| North Gyeongsang | Lee Cheol-woo | Kwon Oe-eul | Park Chang-ho | Yoo Jae-hi | ||
| South Gyeongsang | Kim Kyoung-soo | Kim Tae-ho | Kim Yoo-geun | |||
| Jeju | Kim Bang-hoon | Jang Seong-cheol | Won Hee-ryong Ko Eun-young |