SNo,President,Length of term,Rank by,Notes,,,length of,,,,term,1,Park Chung-hee,"17years, 216days",1,"Served 5th, 6th, 7th, 8th, and 9th terms; assassinated"2,Rhee Syng-man,"11years, 281days",2,"Served 1st, 2nd, and 3rd terms; resigned"3,Chun Doo-hwan,"7years, 192days",3,Served 11th and 12th terms4,Roh Tae-woo,"4years, 365days",4,Served 13th term5,Lee Myung-bak,"4years, 365days",4,Served 17th term6,Kim Young-sam,"4years, 364days",6,Served 14th term7,Kim Dae-jung,"4years, 364days",6,Served 15th term8,Roh Moo-hyun,"4years, 364days",6,Served 16th term9,Yun Bo-seon,"1year, 223days",9,Served 4th term; resigned10,Choi Kyu-hah,"0years, 295days",10,Served 10th term; resigned11,Park Geun-hye,"0years, 352days",11,Incumbent: Serving 18th term,,,,For other more formats kindly visit www.downloadexcelfiles.com,,,,,,,,Original source : en.wikipedia.org/wiki/List_of_Presidents_of_South_Korea_by_time_in_office,,,,