Opinion polling for the 2017 South Korean presidential election

This article is a list of opinion polls taken for the 2017 South Korean presidential election. It is divided into polls for intended candidates, and then for the presidential election itself. Two-way polls are used to demonstrate the popularity of one candidate with respect to another, but the election itself was held using first-past-the-post voting and had no runoff round. The polls are ordered by date, with the newest at the top. For more information, visit the National Election Survey Deliberation Committee of Korea.

Graphical summary

Opinion polling 2017 Polling after nominees finalised Fieldwork date Sample size Marginof error Polling firm DPK LKP People Bareun Justice Saenuri Other/none/undecided Lead 9 May 32,672,175 Election result 41.09 24.04 21.42 6.76 6.17 0.13 0.3917.05 9 May ~99,000 ±0.8 KBS/MBC/SBS (exit poll) 41.4 23.3 21.8 7.1 5.9 0.5 18.1 3 May Polling blackout begins. 2 May Sixth debate takes place. 2 May 2,058 ±2.2 Embrain 40.6 19.6 17.8 4.2 7.2 0.8 10.6 21.0 1–2 May 1,015 ±3.1 Gallup Korea 38 16 20 6 8 0.3 12 18 1–2 May 1,016 ±3.1 Realmeter 42.4 18.6 18.6 4.9 7.3 8.2 23.8 1 May 1,018 ±3.1 Embrain 38.6 18.3 22.6 3.7 9.0 0.4 7.8 16.0 30 Apr–1 May 1,046 ±3.0 Jowon C&I 39.5 18.4 23.9 3.5 8.7 6.1 15.6 30 Apr–1 May 1,961 ±2.2 R&Search 41.8 21.2 19.4 3.9 8.7 5.0 20.6 28–29 Apr 1,010 ±3.1 KSOI 43.1 17.4 23.0 4.9 8.2 3.4 20.1 27–29 Apr 1,523 ±2.5 Realmeter 42.6 16.7 20.9 5.2 7.6 1.2 7.0 21.6 28 Apr Fifth debate takes place. 25–27 Apr 1,418 ±2.6 Research View 45.5 15.3 23.7 3.9 6.8 1.0 4.8 21.8 25–27 Apr 1,006 ±3.1 Gallup Korea 40 12 24 4 7 1 13 16 26 Apr 1,000 ±3.1 Korea Research 36.2 12.6 24.7 5.5 8.6 12.4 11.5 24–26 Apr 1,520 ±2.5 Realmeter 44.4 13.0 22.8 5.4 7.5 1.1 4.9 21.6 25 Apr Fourth debate takes place. 25 Apr 1,000 ±3.1 Korea Research 40.1 12.2 25.2 4.6 5.5 12.4 14.9 23–25 Apr 1,772 ±2.3 R&Search 44.3 14.8 26.1 4.6 4.3 5.9 18.2 24–25 Apr 1,000 ±3.1 Korea Research 40.4 10.8 26.4 5.1 8.0 9.3 14.0 23–24 Apr 1,500 ±2.53 Metrix 40.3 9.7 29.6 3.4 4.7 12.3 10.7 23–24 Apr 2,000 ±2.2 JoongAng Ilbo 39.8 11.7 29.4 4.4 5.0 9.7 10.4 22–24 Apr 1,010 ±3.1 Jowon C&I 39.4 13.9 31.1 4.2 3.8 7.6 8.3 23 Apr Third debate takes place. 21–22 Apr 1,030 ±3.1 Kantar Public 37.5 7.6 26.4 2.9 3.3 22.3 11.1 21–22 Apr 1,514 ±2.5 Research & Research 39.1 9.5 30.1 3.8 3.1 14.4 9.0 21–22 Apr 1,021 ±3.1 KSOI 44.4 8.4 32.5 5.0 5.3 4.4 11.9 19–21 Apr 1,530 ±2.5 Realmeter 46.7 10.5 28.4 4.9 4.6 1.3 4.9 18.3 18–20 Apr 1,004 ±3.1 Gallup Korea 41 9 30 3 4 0.2 12 11 18–20 Apr 2,004 ±2.2 Research View 43.3 11.4 31.3 3.8 5.0 1.4 5.2 12.0 19 Apr Second debate takes place. 18–19 Apr ~1,000 ±3.1 Research & Research 40.0 10.2 30.1 2.5 4.7 12.5 9.9 18–19 Apr 1,054 ±3.1 Embrain 40.9 9.5 34.4 2.7 2.8 9.7 6.5 18–19 Apr 1,200 ±2.8 Korea Research 42.0 8.5 31.8 3.9 3.6 10.2 10.2 17–18 Apr 1,012 ±3.1 Realmeter 43.8 10.2 32.3 3.2 4.2 6.3 10.5 16–18 Apr 2,045 ±2.2 R&Search 46.0 10.2 31.3 3.9 3.5 5.1 14.7 15–17 Apr 1,008 ±3.1 Jowon C&I 41.0 12.0 34.3 4.3 3.3 5.1 6.7 17 Apr 1,049 ±3.1 Embrain 37.7 8.5 34.6 3.4 3.5 12.3 3.1 15–16 Apr 1,000 ±3.1 Korea Research 42.6 7.3 35.6 2.7 3.9 7.9 7.0 15–16 Apr 2,000 ±2.2 JoongAng Ilbo 38.5 7.4 37.3 3.9 3.7 9.2 1.2 14–15 Apr 1,015 ±3.1 KSOI 46.9 6.8 34.4 3.4 2.9 5.8 12.5 14–15 Apr 1,058 ±3.1 Kantar Public 36.3 7.2 31.0 2.1 2.7 20.7 5.3 14–15 Apr 1,039 ±3.0 Kantar Public 35.8 8.4 30.2 2.8 2.8 20.0 5.6 13–14 Apr 1,021 ±3.1 Realmeter 44.8 10.3 31.3 3.2 3.5 6.9 13.5 10–14 Apr 2,546 ±1.9 Realmeter 44.8 9.0 34.4 2.3 3.1 6.4 10.4 13 Apr First debate takes place. 12–13 Apr 1,253 ±2.8 Research View 46.0 8.8 36.5 2.4 3.0 3.3 9.5 11–13 Apr 1,010 ±3.1 Gallup Korea 40 7 37 3 3 0.3 10 3 11–12 Apr 1,023 ±3.1 Kantar Public 37.5 7.0 37.2 2.6 3.2 12.5 0.3 11–12 Apr 1,000 ±3.1 Korea Research 38.0 6.5 38.3 2.1 2.7 12.4 0.3 10–12 Apr 1,525 ±2.5 Realmeter 44.8 8.1 36.5 2.8 1.7 6.1 8.3 9–11 Apr 1,997 ±2.2 R&Search 42.3 9.1 37.0 2.0 3.6 6.2 5.3 8–10 Apr 1,046 ±3.1 Jowon C&I 40.6 8.7 34.4 2.9 3.5 9.9 6.2 8–9 Apr 1,018 ±3.1 Realmeter 41.1 8.6 34.8 2.2 4.2 9.1 6.3 8–9 Apr 2,011 ±2.2 Korea Research 32.7 6.5 36.8 1.5 2.8 19.8 4.1 7–8 Apr 1,000 ±3.1 Korea Research 37.7 6.7 37.0 3.0 3.6 7.5 0.7 7–8 Apr 2,300 ±2.0 Kantar Public 35.7 7.2 37.5 2.6 2.6 14.4 1.8 7–8 Apr 1,500 ±2.5 Research & Research 35.2 7.4 34.5 2.8 3.2 16.9 0.7 7–8 Apr 1,023 ±3.1 Research Plus 37.7 6.6 37.7 2.1 2.0 13.9 Tie 3–7 Apr 2,533 ±1.9 Realmeter 42.2 8.9 34.1 3.2 3.6 8.0 8.1 4–6 Apr 1,012 ±3.1 Research View 42.4 10.3 35.1 2.5 2.2 7.5 7.3 4–6 Apr 1,005 ±3.1 Gallup Korea 38 7 35 4 3 13 3 4–5 Apr 1,500 ±2.5 JoongAng Ilbo 38.4 9.6 34.9 2.7 2.1 12.3 3.5 4 Apr 1,042 ±3.1 Embrain 38.0 10.4 34.4 2.1 3.6 12.5 3.6 4 Apr 1,000 ±3.1 Realmeter 41.3 9.2 34.5 3.0 2.5 9.5 6.8 4 Apr 1,000 ±3.1 Korea Research 39.1 8.6 31.8 3.8 3.7 13.0 7.3 3–4 Apr 1,708 ±2.4 R&Search 40.8 12.6 30.9 2.8 3.8 9.1 9.9

Polling before nominees finalised Fieldwork date Sample size Marginof error Polling firm DPK LKP People Bareun Justice Ind. Other/none/undecided Lead 4 Apr Ahn Cheol-soo wins the People Party primary. 3 Apr Moon Jae-in wins the Democratic primary. 1–3 Apr 1,031 ±3.1 Jowon C&I 35.3 13.6 21.6 1.4 3.2 1.7 23.2 13.7 31 Mar Hong Joon-pyo wins the Liberty Korea primary. 28–30 Mar 1,010 ±3.1 Gallup Korea 31 14 8 4 19 2 1 21 12 27–31 Mar 2,550 ±1.9 Realmeter 34.9 12.1 10.0 2.9 18.7 1.7 2.9 2.9 13.9 16.2 27–29 Mar 1,525 ±2.5 Realmeter 35.2 12.0 9.5 7.7 5.3 17.4 2.4 2.6 3.4 4.5 17.8 43.9 11.1 21.0 3.0 4.8 16.2 22.9 28 Mar Yoo Seong-min wins the Bareun primary. 27–28 Mar 1,080 ±3.0 R&Search 33.0 12.6 11.2 7.8 6.1 16.6 0.6 1.4 0.7 2.0 8.5 16.4 25–27 Mar 1,026 ±3.1 Jowon C&I 33.2 13.5 9.9 12.5 13.1 1.4 3.7 2.6 3.8 19.7 26 Mar Liberty Korea primary begins. 23–25 Mar 1,772 ±2.3 R&Search 33.2 17.5 9.4 7.7 ? 11.2 1.2 2.4 ? 2.0 ? 15.7 25 Mar People Party primary begins. 20–24 Mar 2,553 ±1.9 Realmeter 34.4 17.1 10.2 9.5 5.0 12.6 2.2 2.2 1.0 2.9 2.9 17.3 21–23 Mar 1,007 ±3.1 Gallup Korea 31 17 8 6 10 1 1 2 24 14 22 Mar Democratic primary begins. 19–21 Mar 1,589 ±2.5 R&Search 33.2 17.5 9.4 7.7 11.2 1.2 2.4 0.6 2.0 14.8 15.7 18–20 Mar 1,062 ±3.1 Jowon C&I 36.2 14.1 9.8 10.1 14.0 1.4 2.7 1.5 3.0 22.1 15–17 Mar 2,025 ±2.2 Realmeter 36.6 15.6 10.8 9.8 12.0 1.8 3.8 3.9 5.7 21.0 14–16 Mar 1,004 ±3.1 Realmeter 33 18 8 2 10 0.3 0.4 1 7 20.3 15 15 Mar 1,015 ±3.1 Realmeter 37.1 16.8 10.3 7.1 12.0 1.8 4.8 1.8 4.1 4.2 20.3 15 Mar 1,029 ±3.1 Embrain 42.6 10.4 18.4 5.3 4.1 17.5 24.6 41.7 17.1 5.0 4.1 16.2 15.9 24.2 15 Mar Hwang Kyo-ahn (independent) declares he will not run for president. 14 Mar 1,000 ±3.1 Korea Research 30.7 13.3 8.9 2.2 8.9 0.9 1.4 0.7 1.1 9.6 22.3 7.4 12–14 Mar 1,360 ±2.7 R&Search 34.5 15.3 9.6 3.3 11.3 1.6 3.0 1.7 10.2 9.5 10 Mar 1,008 ±3.1 Realmeter 36.0 14.5 9.7 2.4 11.3 2.6 2.4 1.0 3.3 10.1 6.7 21.5 10 Mar The impeachment of Park Geun-hye (Liberty Korea) is upheld by the Constitutional Court. 6–10 Mar 2,544 ? Realmeter 35.1 14.1 10.3 3.6 10.2 2.1 3.1 2.0 13.5 6.0 21.0 7–9 Mar ? ? Gallup Korea 32 17 8 1 9 1 1 9 22 15 6–7 Mar 1,000 ±3.1 Korea Research 30.7 13.7 8.4 1.8 7.6 1.2 1.2 0.6 1.3 11.1 22.4 17.0 6–7 Mar 1,252 ±2.8 R&Search 35.3 13.3 9.3 2.9 8.2 1.8 2.7 1.5 13.8 11.2 21.5 27 Feb–3 Mar 2,025 ±2.2 Realmeter 36.4 12.6 8.9 3.8 10.8 2.9 2.8 1.7 14.9 5.2 21.5 28 Feb–2 Mar 1,010 ±3.1 Gallup Korea 34 15 8 0.3 9 1 0.3 8 24.4 19 27–28 Feb 1,111 ? R&Search 37.6 15.5 9.8 1.4 11.1 1.1 1.8 1.2 0.9 12.5 8.3 22.1 25–27 Feb 1,017 ±3.1 Jowon C&I 35.2 16.1 8.9 11.0 1.7 3.0 2.0 14.8 7.3 19.1 24–25 Feb 1,000 ±3.1 Korea Research 30.9 15.8 10.1 1.6 7.8 0.8 1.6 0.1 1.1 10.3 19.9 15.1 20–24 Feb 2,516 ±2.0 Realmeter 33.5 18.9 10.1 3.6 10.1 2.2 3.5 1.3 10.9 5.9 14.6 21–23 Feb 1,006 ±3.1 Gallup Korea 32 21 8 8 2 8 21 11 20–22 Feb 1,508 ±2.5 Realmeter 32.4 19.2 10.1 3.3 10.5 1.7 3.3 1.8 1.1 11.6 5.0 13.2 20–21 Feb 1,209 ±2.8 R&Search 34.1 20.7 9.0 1.0 9.6 2.0 3.6 0.5 11.1 8.4 13.4 18–20 Feb 1,052 ±3.1 Jowon C&I 35.6 21.6 7.1 8.5 2.2 4.5 1.3 14.2 5.0 14.0 13–17 Feb 1,521 ±2.0 Realmeter 32.5 20.4 8.1 1.8 8.8 2.6 3.9 2.1 14.8 5.0 12.1 16 Feb Sim Sang-jung wins the Justice primary. 13 Feb Saenuri rebrands to Liberty Korea. 14–16 Feb 1,003 ±3.1 Gallup Korea 33 22 5 9 1 2 9 19 11 13–15 Feb 1,515 ±2.5 Realmeter 32.7 19.3 7.0 1.3 8.6 2.8 3.9 1.3 2.5 16.5 4.1 13.4 14 Feb 1,082 ±3.0 R&Search 36.2 19.2 6.8 8.6 1.7 2.7 0.7 13.2 10.9 17.0 6–10 Feb 2,511 ±2.0 Realmeter 32.9 16.7 7.8 1.8 9.5 3.2 3.9 2.3 15.3 6.6 16.2 7–9 Feb 1,007 ±3.1 Gallup Korea 29 19 8 7 1 3 11 22 10 6–8 Feb 1,508 ±2.5 Realmeter 33.2 15.7 8.2 1.4 9.1 3.1 3.5 1.9 2.6 15.9 5.4 17.5 5–6 Feb 2,016 ±2.2 Korea Research 29.8 14.2 6.3 6.3 1.1 3.2 0.6 0.7 11.2 26.6 15.6 1–3 Feb 1,519 ±2.5 Realmeter 31.2 13.0 8.6 1.5 10.9 2.3 4.9 1.1 12.4 14.1 18.2 1–2 Feb 1,003 ±3.1 Embrain 33.1 12.3 8.9 9.2 1.7 4.6 0.8 1.3 11.8 16.3 20.8 1–2 Feb ? ? Kantar Public 29.8 13.0 8.9 9.2 1.5 2.7 <1 <1 9.4 25.5 16.8 1–2 Feb 1,003 ±3.1 Gallup Korea 32 10 7 7 0.5 3 0.6 8 9 22.9 22 1 Feb 1,009 ±3.1 Realmeter 26.1 11.1 9.9 9.3 4.3 12.1 27.2 14.0 1 Feb 1,009 ±3.1 Realmeter 26.1 11.1 9.9 1.4 9.3 2.7 4.3 2.0 1.8 12.1 19.3 14.0 1 Feb 1,000 ±3.1 Realmeter 25.4 11.2 9.6 9.0 4.9 10.5 29.4 14.2 31 Jan–1 Feb 1,021 ±3.1 Embrain 33.9 8.2 9.0 8.1 1.6 3.4 0.9 0.8 13.0 7.8 13.3 20.6 1 Feb Ban Ki-moon (independent) declares he will not run for president. 30 Jan 1,011 ±3.1 Research & Research 32.8 9.1 10.5 0.3 7.6 0.7 2.8 1.6 13.1 8.3 13.5 19.7 28–30 Jan 1,096 ±3.0 Jowon C&I 32.0 8.4 9.3 9.1 8.2 33.0 22.7 26 Jan Park Won-soon (DPK) declares he will not run for president. 23–26 Jan 2,019 ±2.2 Realmeter 28.4 6.8 9.6 0.3 8.5 2.1 2.4 1.2 16.5 5.5 18.7 11.9 23–24 Jan 1,000 ±3.1 Embrain 31.2 7.4 10.7 2.1 7.4 1.6 1.8 0.4 0.4 16.0 7.9 12.0 11.9 23–24 Jan 1,004 ±3.1 Realmeter 32.8 6.4 9.5 7.9 2.0 2.4 0.9 1.0 15.4 7.4 14.3 17.4 22–23 Jan 1,124 ±2.9 R&Search 34.8 5.8 9.3 2.0 6.3 2.3 2.3 1.7 18.0 7.0 10.5 16.8 16–20 Jan 2,520 ±2.0 Realmeter 29.1 4.7 10.1 3.4 0.9 7.4 1.8 2.2 1.6 19.8 4.6 14.4 9.3 16–18 Jan 1,507 ±2.5 Realmeter 28.1 4.0 9.0 0.7 4.0 7.4 1.8 1.9 21.8 4.0 17.3 6.3 15–16 Jan 1,00 ±3.1 Korea Reaearch 31.4 3.9 9.5 4.8 1.3 1.2 20.0 27.9 11.4 15–16 Jan 1,165 ±2.9 R&Search 32.0 4.4 9.5 2.8 2.8 6.2 1.8 1.5 24.0 4.7 13.1 8.0 10–12 Jan 1,007 ±3.1 Gallup Korea 31 6 12 7 2 3 20 5 14 11 9–13 Jan 2,526 ±1.9 Realmeter 26.1 4.9 11.7 4.4 1.3 7.0 2.3 2.2 2.2 22.2 15.7 3.9 8–9 Jan 1,065 ±3.0 R&Search 32.5 3.3 10.5 3.3 6.0 2.0 1.3 21.3 5.6 14.2 11.2 2–6 Jan 2,525 ±2.0 Realmeter 26.8 5.0 12.0 4.3 1.0 6.5 3.0 3.4 21.5 16.5 5.3 1–2 Jan 1,153 ±2.9 R&Search 32.2 3.9 10.0 3.3 5.9 3.1 2.1 21.3 7.2 11.0 10.9 1–2 Jan 1,004 ±3.1 Gallup Korea 29 3 10 5 1.4 1.3 0.2 18 3 29.1 11

Hypothetical polling Four-way race Fieldwork date Sample size Marginof error Polling firm DPK LKP People Bareun Justice Other/none/undecided Lead 28–29 Apr 1,010 ±3.1 KSOI 42.0 19.2 24.8 10.7 3.3 17.2 41.6 16.1 28.3 10.6 3.4 13.3 23–24 Apr 1,500 ±2.53 Metrix 39.8 9.8 31.3 5.0 14.1 8.5 18–19 Apr 1,054 ±3.1 Embrain 43.1 10.6 34.2 3.0 9.1 8.9 42.3 39.2 3.7 2.8 12.0 3.1 17 Apr 1,049 ±3.1 Embrain 38.6 39.3 5.0 ? ? 0.7 39.2 9.0 35.4 ? ? 3.8 14–15 Apr 1,015 ±3.1 KSOI 44.1 9.1 36.9 4.0 5.9 7.2 45.0 7.0 38.4 3.8 5.8 6.6 8–9 Apr 2,011 ±2.2 Korea Research 32.8 9.4 37.1 2.9 17.8 4.3 32.3 39.1 5.7 2.8 20.1 6.8 33.6 7.4 40.4 2.9 15.7 6.8 7–8 Apr 2,300 ±2.0 Kantar Public 36.3 8.2 40.1 2.7 12.6 3.8 36.2 43.8 4.6 2.6 12.9 7.6 7–8 Apr 1,500 ±2.5 Research & Research 35.2 ? 36.8 ? ? 1.6 36.7 ? 40.5 ? ? 3.8 7–8 Apr 1,023 ±3.1 Research Plus 35.8 10.5 37.4 2.6 13.7 2.6 37.2 7.9 42.3 2.5 10.1 5.1 4 Apr 1,042 ±3.1 Embrain 39.0 41.0 4.0 ? ? 2.0 38.8 11.4 36.2 ? ? 2.6

Three-way race