K3 League (2007–2019)
| Organising body | Korea Football Association |
|---|---|
| Founded | 2007 |
| First season | 2007 |
| Folded | 2019 |
| Country | South Korea |
| Divisions | K3 League Advanced K3 League Basic |
| Level on pyramid | 3 (2007–2012) 4 (2013–2016) 4–5 (2017–2019) |
| Domestic cup | Korean FA Cup |
| League cup | Challengers Cup |
| Most championships | Pocheon Citizen (6 titles) |
The K3 League (Korean: K3리그) was a South Korean amateur football league held annually from 2007 to 2019. It was considered the third-highest division of the South Korean football league system before the K League 2 was launched in 2013, and the fourth-highest division since then. In 2017, it was divided into K3 League Advanced and fifth-tier league K3 League Basic, and introduced a system of promotion and relegation. In 2020, it was reborn as a semi-professional league after merging with the Korea National League.