21th President of South Korea. The current president, Yoon Suk-yeol, is the 20th*.

• Some sources write 13th - this is due to a history of some presidents in the past serving multiple terms, but Koreans generally seem to call him the 20th, so I'll go with that. You may ignore these issues.

Initial options are brought from a survey (http://nbsurvey.kr/archives/6806) - you may add figures yourself.

Note that the result has nothing to do with whether the current president is impeached. It has only to do with whom the next president will be, regardless of when.