| Yi Si-yeong | |||||||||||||||||||||||||||||
| Party: | Democratic Party | ||||||||||||||||||||||||||||
| Office1: | 1st Vice President of South Korea | ||||||||||||||||||||||||||||
| Predecessor1: | Position established | ||||||||||||||||||||||||||||
| President1: | Syngman Rhee | ||||||||||||||||||||||||||||
| Successor1: | Kim Seong-su | ||||||||||||||||||||||||||||
| Birth Date: | 3 December 1868 | ||||||||||||||||||||||||||||
| Birth Place: | Hanseong-bu, Joseon | ||||||||||||||||||||||||||||
| Death Place: | Busan, South Korea | ||||||||||||||||||||||||||||
| Term Start1: | 24 July 1948 | ||||||||||||||||||||||||||||
| Term End1: | 9 May 1951 | ||||||||||||||||||||||||||||
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Seongjae Yi Si-yeong (; December 3, 1868 - April 19, 1953) was a Korean politician, independence activist, educator and neo-Confucianist scholar. He was the first vice president of South Korea from 1948 to 1951.[1] Yi resigned after the National Defense Corps incident of 1951. His art names were Seongjae or Sirimsanin . Before the Japan–Korea Treaty of 1910, he had served for Joseon as the Governor of South Pyongan Province and the President of Hansung Law Court.