| GS Caltex Maekyung Open | |
| Location: | Seongnam, South Korea |
| Establishment: | 1982 |
| Course: | Nam Seoul Country Club |
| Par: | 71 |
| Yardage: | 7039yd |
| Tour: | Asian Tour Korean Tour OneAsia Tour Asia Golf Circuit |
| Format: | Stroke play |
| Month Played: | May |
| Aggregate: | 267 Kim Kyung-tae (2011) |
| To-Par: | −21 as above |
| Current Champion: |  Kim Hong-taek |
| Map: | South Korea |
| Map Relief: | yes |
| Map Label: | Nam Seoul CC |
| Coordinates: | 37.382°N 127.081°W |
The GS Caltex Maekyung Open, as it is known for sponsorship reasons, is a professional golf tournament that takes place in Seongnam, Gyeonggi Province, South Korea. It was established in 1982,[1] replacing the Korea Open as the South Korean event on the Asia Golf Circuit.[2] Between 1999 and 2009 (except for 2004) it was a stop on the Asian Tour, and then in 2010 it became part of the OneAsia Tour schedule.[3] Since 2018, it has again been a fixture on the Asian Tour, except for 2020 and 2021 due to restrictions in place during the COVID-19 pandemic.
In 2005, Korean Choi Sang-ho won the tournament and set an Asian Tour record as the oldest winner on tour at 50 years and 145 days.
This tournament has generally been staged at the Nam Seoul Country Club. It has only been staged in four venues. The other venues that have been used are Lakeside in 1998, 1999, 2004 and 2006, Gwanak in 1984 and Elysian Gangchon in 2020.
| Year | Tour(s) | Winner | Score | To par | Margin of victory | Runner(s)-up | Venue | |
|---|---|---|---|---|---|---|---|---|
| GS Caltex Maekyung Open | ||||||||
| 2024 | 274 | −10 | Playoff | Nam Seoul | ||||
| 2023 | 197 | −16 | 6 strokes | Lee Jung-hwan Song Min-hyuk (a) | Nam Seoul | |||
| 2022 | Kim Bi-o (2) | 275 | −9 | 2 strokes | Nam Seoul | |||
| 2021 | 279 | −5 | 2 strokes | Nam Seoul | ||||
| 2020 | Lee Tae-hee (2) | 199 | −11 | 1 stroke | Elysian Gangchon | |||
| 2019 | 275 | −9 | Playoff |  Janne Kaske | Nam Seoul | |||
| 2018 | Park Sang-hyun (2) | 283 | −1 | Playoff |  Gaganjeet Bhullar Chang Yi-keun Hwang Jung-gon | Nam Seoul | ||
| 2017 | 276 | −8 | 2 strokes | Moon Kyong-jun | Nam Seoul | |||
| 2016 | 280 | −8 | Playoff | Lee Soo-min | Nam Seoul | |||
| 2015 | 284 | −4 | 2 strokes |  Ryan Fox Kim Do-hoon 752 Jason Norris Gareth Paddison | Nam Seoul | |||
| 2014 | 273 | −15 | 3 strokes | Park Sang-hyun | Nam Seoul | |||
| 2013 | 274 | −14 | 1 stroke | Kim Do-hoon 753 Kim Hyung-sung | Nam Seoul | |||
| 2012 | 273 | −15 | 5 strokes | Ryu Hyun-woo | Nam Seoul | |||
| 2011 | Kim Kyung-tae (2) | 267 | −21 | 8 strokes | Kim Hyung-sung Cho Min-kyu | Nam Seoul | ||
| 2010 | 270 | −18 | 4 strokes | Kim Kyung-tae | Nam Seoul | |||
| 2009 | 281 | −7 | Playoff | Ted Oh | Nam Seoul | |||
| 2008 | 279 | −9 | Playoff | Noh Seung-yul | Nam Seoul | |||
| 2007 | 270 | −18 | 5 strokes |  Liang Wenchong | Nam Seoul | |||
| 2006 | 271 | −17 | 1 stroke |  Bryan Saltus | Lakeside | |||
| KT&G Maekyung Open | ||||||||
| 2005 | 278 | −10 | 3 strokes |  Thaworn Wiratchant | Nam Seoul | |||
| Maekyung Open | ||||||||
| 2004 | 282 | −6 | 2 strokes | Jang Ik-jae | Lakeside | |||
| 2003 | 275 | −13 | 1 stroke | Amandeep Johl | Nam Seoul | |||
| Maekyung LG Fashion Open | ||||||||
| 2002 | Eddie Lee (a) | 268 | −20 | 1 stroke | Thammanoon Sriroj | Nam Seoul | ||
| 2001 | 271 | −17 | 1 stroke | Arjun Atwal Kim Dae-sub (a) | Nam Seoul | |||
| 2000 | 278 | −10 | 1 stroke | Kim Felton | Nam Seoul | |||
| Maekyung Daks Open | ||||||||
| 1999 | 277 | −11 | Playoff | Kyi Hla Han | Lakeside | |||
| Maekyung LG Fashion Open | ||||||||
| 1998 | 205 | −11 | 3 strokes | Kwon Young-suk | Lakeside | |||
| 1997 | 272 | −16 | 1 stroke | Tim Balmer | Nam Seoul | |||
| 1996 | Park Nam-sin (2) | 285 | −3 | 5 strokes | Kim Sung-ho Rob Moss | Nam Seoul | ||
| Maekyung Bando Fashion Open | ||||||||
| 1995 | 280 | −8 | 4 strokes | Choi Sang-ho | Nam Seoul | |||
| Maekyung Open | ||||||||
| 1994 | 284 | −4 | Playoff |  Jim Rutledge Mike Tschetter | Nam Seoul | |||
| 1993 | 281 | −7 | 1 stroke | New Korea | ||||
| 1992 | 280 | −8 | Playoff |  Lin Chie-hsiang | Nam Seoul | |||
| 1991 | 281 | −7 | 2 strokes | Hsieh Chin-sheng Park Nam-sin | Nam Seoul | |||
| 1990 | 212 | −4 | 3 strokes | Hsieh Chin-sheng | Nam Seoul | |||
| 1989 | 277 | −11 | 1 stroke | Chen Liang-hsi | Nam Seoul | |||
| 1988 | 279 | −9 | 1 stroke | Lim Jin-han | Nam Seoul | |||
| 1987 | 279 | −9 | 3 strokes | Kim Sung-ho Brian Tennyson | Nam Seoul | |||
| 1986 | 280 | −8 | 1 stroke | Hsieh Yu-shu | Nam Seoul | |||
| 1985 | 280 | −8 | 2 strokes | Nam Seoul | ||||
| 1984 | 283 | −5 | 1 stroke | John Jacobs Lu Hsi-chuen | Gwanak | |||
| 1983 | 212 | −4 | 1 stroke | Lu Hsi-chuen | Seoul | |||
| 1982 | Kim Joo-heun (a) | 285 | −3 | 3 strokes |  Rafael Alarcón | Seoul | ||