This is a list of foreign players in K League 1.
- Players in bold are currently playing in K League 1.
- Nationality is listed under the official K League player registration; players may acquire multiple citizenship.
- If players have been capped for a national team, this nationality takes precedence over the nationality stated in the official K League player registration database.
- In dual citizen annotation, if dual citizen players have an international career, the country listed in italics is the national team they have played for.
Europe (UEFA)
Albania
Armenia
Austria
Azerbaijan
Belarus
Belgium
Bosnia and Herzegovina
Bulgaria
Croatia
Cyprus
Czech Republic
Denmark
England
Finland
France
Georgia
Germany
Hungary
Italy
Latvia
Lithuania
Moldova
Montenegro
※ Includes players who joined in Federal Republic of Yugoslavia (1992–2003) and Serbia and Montenegro (2003–2006) period
Netherlands
North Macedonia
※ Known as Macedonia before 2019
Northern Ireland
Norway
Poland
Portugal
Romania
Russia
Serbia
※ Includes players who played during the Federal Republic of Yugoslavia (1992–2003) and Serbia and Montenegro (2003–2006) period
- Nebojša Vučićević (1991–1993 Daewoo Royals)
- Rade Bogdanović (1992–1996 Pohang Atoms)
- Zoran Kuntić (1993 POSCO Atoms)
- Zoran Vukčević (1993 Hyundai Horang-i)
- Goran Jevtić (1993–1995 Hyundai Horang-i)
- Aleksandar Jozević (1993 Daewoo Royals)
- Đorđe Vasić (1994 Ilhwa Chunma)
- Nebojša Maksimović (1994 Ilhwa Chunma)
- Željko Simović (1994 Daewoo Royals)
- Jovan Šarčević (1994–1995 LG Cheetahs)
- Boško Minić (1995 Jeonnam Dragons)
- Saša Drakulić (1995–1998 Busan Daewoo Royals, 1998–2000 Suwon Samsung Bluewings, 2001–2003 Seongnam Ilhwa Chunma)
- Ljubiša Ranković (1995–1996 Ilhwa Chunma / Cheonan Ilhwa Chunma)
- Nenad Nonković (1995–1996 Ilhwa Chunma / Cheonan Ilhwa Chunma)
- Branko Božović (1996 Ulsan Hyundai Horang-i)
- Dražen Podunavac (1996 Busan Daewoo Royals)
- Zoran Đurišić (1996 Ulsan Hyundai Horang-i)
- Radivoje Manić (1996–1997 & 1999–2002 Busan Dawoo Royals / Busan I'Cons, 2004–2005 Incheon United)
- Radmilo Mihajlović (1997 Pohang Steelers)
- Rahim Beširović (1998–1999 Busan Daewoo Royals)
- Zoran Novaković (1998–1999 Busan Daewoo Royals)
- Branko Radovanović (1999 Busan Daewoo Royals)
- Mirko Jovanović (1999–2000 Jeonbuk Hyundai Motors)
- Zoran Milošević (1999–2001 Jeonbuk Hyundai Motors)
- Zoran Urumov (1999–2003 Busan I'Cons, 2003–2004 Suwon Samsung Bluewings)
- Nemanja Dančetović (2000 Ulsan Hyundai Horang-i)
- Zoltan Sabo (2000–2002 Suwon Samsung Bluewings)
- Dragan Stojisavljević (2000–2001 & 2003–2004 Anyang LG Cheetahs / FC Seoul, 2004 Incheon United)
- Dušan Šimić (2003 Busan I'Cons)
- Đorđe Tomić (2004 Incheon United)
- Miodrag Anđelković (2004 Incheon United)
- Dragan Mladenović (2006–2009 Incheon United)
- Ivan Perić (2007 Jeju United)
- Željko Kalajdžić (2007 Incheon United)
- Aleksandar Petrović (2008–2009 Jeonbuk Hyundai Motors, 2009 Jeonnam Dragons)
- Borko Veselinović (2008–2009 Incheon United)
- Lazar Popović (2009 Daegu FC)
- Stevan Račić (2009 Daejeon Citizen)
- Ognjen Koroman (2009–2010 Incheon United)
- Vladimir Jovančić (2012 Seongnam Ilhwa Chunma)
- Zoran Rendulić (2012 Pohang Steelers)
- Miloš Bosančić (2013–2014 Gyeongnam FC)
- Sreten Sretenović (2013–2014 Gyeongnam FC)
- Milan Bubalo (2013 Gyeongnam FC)
- Nikola Komazec (2014 Busan IPark)
- Miloš Stojanović (2014 Gyeongnam FC); also played in K League 2
- Lazar Veselinović (2015–2016 Pohang Steelers)
- Dalibor Veselinović (2017 Incheon United)
- Uroš Đerić (2018–2019 Gangwon FC, 2019 Gyeongnam FC, 2021 Suwon Samsung Bluewings); also played in K League 2
- Bojan Matić (2018 FC Seoul)
- Aleksandar Pešić (2019–2020 FC Seoul)
- Aleksandar Paločević (2019–2020 Pohang Steelers, 2021–present FC Seoul)
- Vladimir Silađi (2021 Gangwon FC)
- Fejsal Mulić (2021–2022 Seongnam FC, 2023 Suwon Samsung Bluewings); also played in K League 2
Slovenia
Spain
Sweden
Switzerland
Turkey
Ukraine