| Lee Ki-poong | |
| Office: | 3rd and 4th Mayor of Seoul |
| Term Start: | 6 June 1949 |
| Term End: | 8 May 1951 |
| Predecessor: | Yun Bo-seon |
| Successor: | Kim Taeson |
| Office2: | Minister of National Defense |
| Term Start2: | 7 May 1951 |
| Term End2: | 29 March 1952 |
| President2: | Syngman Rhee |
| Predecessor2: | Shin Song-mo |
| Successor2: | Shin Tae-young |
| Birth Date: | 20 December 1896 |
| Birth Place: | Goesan County, North Chungcheong Province, Joseon |
| Death Place: | Seoul, South Korea |
| Hangul: | 이기붕 |
| Hanja: | 李起鵬 |
| Rr: | I Gibung |
| Mr: | I Kibung |
Lee Ki-poong (20 December 1896 – 28 April 1960) was a South Korean politician and Vice President elect. He was the Minister of National Defense (May 7, 1951 – March 29, 1952) and Mayor of Seoul (June 6, 1949 – May 8, 1951). He was the leader of Liberal Party and supporter of Syngman Rhee (as a President). By the 1954 election, Lee became the most prominent member of the Liberal Party. The Liberal Party held power from 1948 to 1960.
On March 15, 1960, South Korea held a presidential election. The Liberal Party, which included Syngman Rhee and Lee Ki-poong, won by a very wide margin and was accused of electoral fraud. As a result, the April Revolution took place in April 1960. President Rhee resigned on April 26, 1960. Lee Ki-poong's family also resigned.
On April 28, 1960, in an annex of Rhee's mansion, Lee Ki-poong's first son, Lee Kang-seok (1937 – April 28, 1960) shot Lee Ki-poong and his family and then killed himself in a murder–suicide.[1] [2]