Yi Yeong-ku (also transliterated as Lee Yeongkyu , Lee Youngkyu, or Lee Younggu), born 1987 August 23, is a Korean professional. He became a professional 1 dan in 2001, promoted to 3 dan in 2003, and promoted to 7 dan in 2007. On 2010-01-11 Lee was promoted 8 dan due his win against Yang Jaeho in the preliminaries of the 2nd Bccard and in 2011-09-29 to 9 dan, by winning the 7th Korean Prices Information Cup.
His teacher was Kweon Kap-yong. He took second place in the 13th and 14th BC Card Cup (New Pro in 2003 and 2004), 5th Osram Cup (2005), 11th SK Gas Cup (2006), 40th Wangwi (2006) and 3rd Korean Prices Information Cup (2007).