Regional head elections
| Party | Votes | % | Seats | +/– |
|---|
| Grand National Party | 10,418,021 | 55.25 | 12 | +1 |
| Uri Party | 5,106,984 | 27.08 | 1 | New |
| Democratic Party | 1,709,452 | 9.07 | 2 | –3 |
| Democratic Labor Party | 1,099,592 | 5.83 | 0 | 0 |
| People First Party | 345,295 | 1.83 | 0 | New |
| Hanmijun | 7,188 | 0.04 | 0 | New |
| Citizens' Party | 4,790 | 0.03 | 0 | New |
| Independents | 166,284 | 0.88 | 1 | +1 |
| Total | 18,857,606 | 100.00 | 16 | 0 |
|
| Valid votes | 18,857,606 | 98.64 | |
|---|
| Invalid/blank votes | 260,571 | 1.36 | |
|---|
| Total votes | 19,118,177 | 100.00 | |
|---|
| Registered voters/turnout | 37,064,282 | 51.58 | |
|---|
| Source: National Election Commission[1][2] |
Seoul
| Candidate | Party | Votes | % |
|---|
| Oh Se-hoon | Grand National Party | 2,409,760 | 61.06 |
| Kang Kum-sil | Uri Party | 1,077,890 | 27.31 |
| Park Joo-sun | Democratic Party | 304,565 | 7.72 |
| Kim Jong-chul | Democratic Labor Party | 117,421 | 2.98 |
| Lim Woong-kyun | People First Party | 14,111 | 0.36 |
| Baek Seung-won | Independent | 13,808 | 0.35 |
| Lee Gwi-sun | Citizens' Party | 4,790 | 0.12 |
| Lee Tae-hee | Hanmijun | 4,481 | 0.11 |
| Total | 3,946,826 | 100.00 |
|
| Valid votes | 3,946,826 | 99.22 |
|---|
| Invalid/blank votes | 31,016 | 0.78 |
|---|
| Total votes | 3,977,842 | 100.00 |
|---|
| Registered voters/turnout | 7,983,648 | 49.82 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
Busan
| Candidate | Party | Votes | % |
|---|
| Hur Nam-sik (incumbent) | Grand National Party | 895,214 | 65.55 |
| Oh Keo-don | Uri Party | 329,470 | 24.12 |
| Kim Seok-joon | Democratic Labor | 141,061 | 10.33 |
| Total | 1,365,745 | 100.00 |
|
| Valid votes | 1,365,745 | 99.07 |
|---|
| Invalid/blank votes | 12,873 | 0.93 |
|---|
| Total votes | 1,378,618 | 100.00 |
|---|
| Registered voters/turnout | 2,845,104 | 48.46 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
Daegu
| Candidate | Party | Votes | % |
|---|
| Kim Bum-il | Grand National Party | 636,057 | 70.15 |
| Lee Jae-yong | Uri Party | 191,131 | 21.08 |
| Lee Youn-jae | Democratic Labor Party | 35,497 | 3.92 |
| Paik Seung-hong | Independent | 35,232 | 3.89 |
| Park Seung-gook | People First Party | 8,764 | 0.97 |
| Total | 906,681 | 100.00 |
|
| Valid votes | 906,681 | 99.08 |
|---|
| Invalid/blank votes | 8,379 | 0.92 |
|---|
| Total votes | 915,060 | 100.00 |
|---|
| Registered voters/turnout | 1,885,043 | 48.54 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
Incheon
| Candidate | Party | Votes | % |
|---|
| Ahn Sang-soo (incumbent) | Grand National Party | 526,932 | 61.93 |
| Choi Ki-sun | Uri Party | 200,650 | 23.58 |
| Kim Sung-jin | Democratic Labor Party | 78,898 | 9.27 |
| Shin Kyung-cheol | Democratic Party | 44,339 | 5.21 |
| Total | 850,819 | 100.00 |
|
| Valid votes | 850,819 | 98.99 |
|---|
| Invalid/blank votes | 8,687 | 1.01 |
|---|
| Total votes | 859,506 | 100.00 |
|---|
| Registered voters/turnout | 1,940,403 | 44.30 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
Gwangju
| Candidate | Party | Votes | % |
|---|
| Park Gwang-tae (incumbent) | Democratic Party | 239,884 | 51.62 |
| Cho Young-taek | Uri Party | 157,756 | 33.95 |
| Oh Byung-yoon | Democratic Labor Party | 48,617 | 10.46 |
| Han Young | Grand National Party | 18,461 | 3.97 |
| Total | 464,718 | 100.00 |
|
| Valid votes | 464,718 | 99.02 |
|---|
| Invalid/blank votes | 4,598 | 0.98 |
|---|
| Total votes | 469,316 | 100.00 |
|---|
| Registered voters/turnout | 1,014,620 | 46.26 |
|---|
| Democratic hold |
| Source: National Election Commission[3] |
Daejeon
| Candidate | Party | Votes | % |
|---|
| Park Sung-hyo | Grand National Party | 231,489 | 43.84 |
| Yeom Hong-cheol (incumbent) | Uri Party | 217,273 | 41.15 |
| Nam Choong-hee | People First Party | 55,231 | 10.46 |
| Park Choon-ho | Democratic Labor Party | 14,899 | 2.82 |
| Choi Ki-bok | Democratic Party | 6,442 | 1.22 |
| Koh Nak-jung | Hanmijun | 2,707 | 0.51 |
| Total | 528,041 | 100.00 |
|
| Valid votes | 528,041 | 99.15 |
|---|
| Invalid/blank votes | 4,527 | 0.85 |
|---|
| Total votes | 532,568 | 100.00 |
|---|
| Registered voters/turnout | 1,077,468 | 49.43 |
|---|
| Grand National gain from Uri |
| Source: National Election Commission[3] |
Gyeonggi
| Candidate | Party | Votes | % |
|---|
| Kim Moon-soo | Grand National Party | 2,181,677 | 59.68 |
| Jin Dae-je | Uri Party | 1,124,317 | 30.76 |
| Kim Yong-han | Democratic Labor Party | 201,106 | 5.50 |
| Park Jung-il | Democratic Party | 148,409 | 4.06 |
| Total | 3,655,509 | 100.00 |
|
| Valid votes | 3,655,509 | 98.92 |
|---|
| Invalid/blank votes | 40,043 | 1.08 |
|---|
| Total votes | 3,695,552 | 100.00 |
|---|
| Registered voters/turnout | 7,918,828 | 46.67 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
Gangwon
| Candidate | Party | Votes | % |
|---|
| Kim Jin-sun (incumbent) | Grand National Party | 471,613 | 70.57 |
| Lee Chang-bok | Uri Party | 148,302 | 22.19 |
| Yoo Jae-gyu | Democratic Party | 29,028 | 4.34 |
| Yoo Seung-gyu | People First Party | 19,383 | 2.90 |
| Total | 668,326 | 100.00 |
|
| Valid votes | 668,326 | 98.05 |
|---|
| Invalid/blank votes | 13,307 | 1.95 |
|---|
| Total votes | 681,633 | 100.00 |
|---|
| Registered voters/turnout | 1,160,977 | 58.71 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
North Chungcheong
| Candidate | Party | Votes | % |
|---|
| Chung Woo-taik | Grand National Party | 361,157 | 59.66 |
| Han Beom-deok | Uri Party | 185,426 | 30.63 |
| Bae Chang-ho | Democratic Labor Party | 39,095 | 6.46 |
| Cho Byung-se | People First Party | 19,646 | 3.25 |
| Total | 605,324 | 100.00 |
|
| Valid votes | 605,324 | 98.26 |
|---|
| Invalid/blank votes | 10,729 | 1.74 |
|---|
| Total votes | 616,053 | 100.00 |
|---|
| Registered voters/turnout | 1,126,282 | 54.70 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
South Chungcheong
| Candidate | Party | Votes | % |
|---|
| Lee Wan-koo | Grand National Party | 379,420 | 46.31 |
| Lee Myung-soo | People First | 209,254 | 25.54 |
| Oh Young-kyo | Uri Party | 178,169 | 21.75 |
| Lee Yong-gil | Democratic Labor Party | 52,417 | 6.40 |
| Total | 819,260 | 100.00 |
|
| Valid votes | 819,260 | 97.71 |
|---|
| Invalid/blank votes | 19,202 | 2.29 |
|---|
| Total votes | 838,462 | 100.00 |
|---|
| Registered voters/turnout | 1,126,282 | 74.45 |
|---|
| Grand National gain |
| Source: National Election Commission[3] |
North Jeolla
| Candidate | Party | Votes | % |
|---|
| Kim Wan-ju | Uri Party | 389,436 | 48.08 |
| Chung Kyun-hwan | Democratic Party | 295,891 | 36.53 |
| Moon Yong-ju | Grand National Party | 62,922 | 7.77 |
| Yeom Kyung-suk | Democratic Labor Party | 61,672 | 7.61 |
| Total | 809,921 | 100.00 |
|
| Valid votes | 809,921 | 97.89 |
|---|
| Invalid/blank votes | 17,466 | 2.11 |
|---|
| Total votes | 827,387 | 100.00 |
|---|
| Registered voters/turnout | 1,429,632 | 57.87 |
|---|
| Uri gain from Democratic |
| Source: National Election Commission[3] |
South Jeolla
| Candidate | Party | Votes | % |
|---|
| Park Jun-young | Democratic Party | 640,894 | 67.69 |
| Seo Beom-seok | Uri Party | 181,756 | 19.20 |
| Park Woong-doo | Democratic Labor Party | 68,702 | 7.26 |
| Park Jae-soon | Grand National Party | 55,444 | 5.86 |
| Total | 946,796 | 100.00 |
|
| Valid votes | 946,796 | 97.22 |
|---|
| Invalid/blank votes | 27,024 | 2.78 |
|---|
| Total votes | 973,820 | 100.00 |
|---|
| Registered voters/turnout | 1,513,912 | 64.32 |
|---|
| Democratic hold |
| Source: National Election Commission[3] |
North Gyeongsang
| Candidate | Party | Votes | % |
|---|
| Kim Kwan-yong | Grand National Party | 961,363 | 76.80 |
| Park Myung-jae | Uri Party | 290,358 | 23.20 |
| Total | 1,251,721 | 100.00 |
|
| Valid votes | 1,251,721 | 97.46 |
|---|
| Invalid/blank votes | 32,621 | 2.54 |
|---|
| Total votes | 1,284,342 | 100.00 |
|---|
| Registered voters/turnout | 2,087,709 | 61.52 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
South Gyeongsang
| Candidate | Party | Votes | % |
|---|
| Kim Tae-ho | Grand National Party | 852,377 | 63.13 |
| Kim Doo-kwan | Uri Party | 343,137 | 25.41 |
| Moon Sung-hyun | Democratic Labor Party | 135,823 | 10.06 |
| Kim Jae-ju | People First Party | 18,906 | 1.40 |
| Total | 1,350,243 | 100.00 |
|
| Valid votes | 1,350,243 | 98.28 |
|---|
| Invalid/blank votes | 23,572 | 1.72 |
|---|
| Total votes | 1,373,815 | 100.00 |
|---|
| Registered voters/turnout | 2,375,265 | 57.84 |
|---|
| Grand National hold |
| Source: National Election Commission[3] |
Jeju
| Candidate | Party | Votes | % |
|---|
| Kim Tae-hwan | Independent | 117,244 | 42.73 |
| Hyun Myung-gwan | Grand National Party | 112,774 | 41.11 |
| Jin Chul-hoon | Uri Party | 44,334 | 16.16 |
| Total | 274,352 | 100.00 |
|
| Valid votes | 274,352 | 99.04 |
|---|
| Invalid/blank votes | 2,651 | 0.96 |
|---|
| Total votes | 277,003 | 100.00 |
|---|
| Registered voters/turnout | 411,862 | 67.26 |
|---|
| Independent gain |
| Source: National Election Commission[3] |
Regional council elections
| Party | Proportional | Constituency | Total seats | +/– |
|---|
| Votes | % | Seats | Votes | % | Seats |
|---|
| Grand National Party | 10,086,354 | 53.76 | 38 | 9,291,686 | 50.81 | 519 | 557 | +90 |
| Uri Party | 4,056,367 | 21.62 | 19 | 4,329,794 | 23.67 | 33 | 52 | New |
| Democratic Labor Party | 2,263,051 | 12.06 | 10 | 507,157 | 2.77 | 5 | 15 | +4 |
| Democratic Party | 1,863,239 | 9.93 | 9 | 1,602,034 | 8.76 | 71 | 80 | –63 |
| People First Party | 436,774 | 2.33 | 2 | 408,610 | 2.23 | 13 | 15 | New |
| Hope Socialist Party | 44,598 | 0.24 | 0 | 6,039 | 0.03 | 0 | 0 | New |
| Citizens' Party | 7,583 | 0.04 | 0 | | 0 | New |
| Hanmijun | 5,112 | 0.03 | 0 | | 0 | New |
| Independents | | 2,143,480 | 11.72 | 14 | 14 | –12 |
| Total | 18,763,078 | 100.00 | 78 | 18,288,800 | 100.00 | 655 | 733 | +51 |
|
| Valid votes | 18,763,078 | 98.15 | | 18,288,800 | 97.91 | | |
|---|
| Invalid/blank votes | 354,516 | 1.85 | | 389,807 | 2.09 | | |
|---|
| Total votes | 19,117,594 | 100.00 | | 18,678,607 | 100.00 | | |
|---|
| Registered voters/turnout | 37,064,282 | 51.58 | | 36,207,648 | 51.59 | | |
|---|
| Source: National Election Commission[1][2] |
Results by province or city
Proportional representation seats
Municipal mayoral elections
| Party | Votes | % | Seats | +/– |
|---|
| Grand National Party | 9,396,305 | 50.76 | 155 | +15 |
| Uri Party | 4,277,001 | 23.11 | 19 | New |
| Democratic Party | 1,530,908 | 8.27 | 20 | –24 |
| Democratic Labor Party | 648,353 | 3.50 | 0 | –2 |
| People First Party | 403,464 | 2.18 | 7 | New |
| Hanmijun | 4,176 | 0.02 | 0 | New |
| Citizens' Paarty | 482 | 0.00 | – | New |
| Independents | 2,250,127 | 12.16 | 29 | –1 |
| Total | 18,510,816 | 100.00 | 230 | –2 |
|
| Source: National Election Commission[1][2] |
Results by province or city
Municipal council elections
| Party | Proportional | Constituency | Total seats | +/– |
|---|
| Votes | % | Seats | Votes | % | Seats |
|---|
| Grand National Party | 9,422,971 | 54.02 | 220 | 8,317,356 | 45.41 | 1,401 | 1,621 | New |
| Uri Party | 4,196,455 | 24.06 | 87 | 3,544,024 | 19.35 | 543 | 630 | New |
| Democratic Party | 1,792,908 | 10.28 | 43 | 1,575,921 | 8.60 | 233 | 276 | New |
| Democratic Labor Party | 1,655,305 | 9.49 | 14 | 1,072,826 | 5.86 | 52 | 66 | New |
| People First Party | 376,675 | 2.16 | 11 | 390,755 | 2.13 | 56 | 67 | New |
| Hanmijun | | 2,708 | 0.01 | 0 | 0 | New |
| Hope Socialist Party | | 2,189 | 0.01 | 0 | 0 | New |
| Citizens' Party | | 455 | 0.00 | 0 | 0 | New |
| Independents | | 3,410,937 | 18.62 | 228 | 228 | –3231 |
| Total | 17,444,314 | 100.00 | 375 | 18,317,171 | 100.00 | 2,513 | 2,888 | –571 |
|
| Source: National Election Commission[1][2] |
Results by province or city
Proportional representation seats