COEX Convention & Exhibition Center (COEX; Korean: 코엑스) located in Samseong-dong of Gangnam-gu district, Seoul, is one of South Korea's convention and exhibition centers.

COEX is serviced by Samseong station on line 2 and Bongeunsa station on line 9 of the Seoul Subway. The 836-meter (914-yard) section of sidewalk along Yeongdong Boulevard from exit No. 5 of Samseong station on to exit No. 7 of Bongeunsa Station is designated as a smoke-free zone by the Seoul Metropolitan Government.

Notable events

• The 2000 Asia-Europe Summit (ASEM)
• 2010 G-20 Seoul summit - November 2010
• 2012 Nuclear Security Summit - 26–27 March 2012
• International Congress on Mathematical Education - 8–15 July 2012
• TVing OSL Finals - 28 July 2012
• Seoul Motor Show