- Source: 2025 K League 1
- Liga 1 (Indonesia) 2024–2025
- Liga 1 (Indonesia)
- Liga Champions UEFA 2024–2025
- Liga Konferensi UEFA
- Liga Champions Elit AFC 2024–2025
- Babak liga Liga Champions UEFA 2024–2025
- Liga Konferensi UEFA 2024–2025
- 2024–25 V-League (Korea Selatan)
- Liga Eropa UEFA 2024–2025
- Liga Challenge AFC 2024–2025
- 2025 K League 1
- 2025 K League 2
- K League 1
- 2024 K League 1
- 2025 Ulsan HD FC season
- K League
- 2024 K League 2
- 2025 FC Seoul season
- 2025 Pohang Steelers season
- 2025–26 AFC Champions League Elite
The 2025 K League 1, also known as the Hana 1Q K League 1 for sponsorship reasons, is the 43rd season of the top division of professional football in South Korea, and the twelfth season of the K League 1. Ulsan HD defended their title for the third consecutive year.
Teams
= Team changes
=FC Anyang were promoted from the 2024 K League 2 for 1st time in club history. Incheon United was relegated to 2025 K League 2 in the club's first absence from the top flight of Korean football.
= Locations
=The following twelve clubs are competing in the 2025 K League 1.
= Stadiums
== Personnel and sponsoring
== Managerial changes
== Foreign players
=The number of allowed foreign players was kept strictly to six per team but could field at most five foreign players at any given time.
As a military-owned team, Gimcheon Sangmu are not allowed to sign any foreign players.
North Korean player An Byong-jun, who played for Suwon FC, was deemed as a native player by South Korean nationality law.
Players in bold were registered during the mid-season transfer window.
Positions by matchday
Leaders, qualification for Champions League Elite league stage
Qualification for Champions League Elite play-off round
Qualification for Champions League Two group stage
Qualification for relegation play-offs
Relegation to K League 2
= Round 1–33
=Results
= Matches 1–22
=Teams played each other twice, once at home, once away.
Relegation play-offs
The tenth-placed team and the eleventh-placed team will play against the play-off winners and the runners-up of the K League 2, respectively, in the relegation play-offs.
Statistics
= Top goalscorers
== Top assist providers
== Hat-tricks
=Attendance
Attendants who entered with free ticket are not counted.
See also
2025 in South Korean football
2025 Korean FA Cup
2025 K League 2