1. Association football

2. Rugby

League One often refers to EFL League One, the third tier of football in England.

League One or League 1 may also refer to:

Association football

• China League One, the second tier of football in China
• K League 1, the top tier professional football league in South Korea
• League1 Ontario, one of two leagues that occupy the third tier of soccer in Canada
• Ligue 1 (League 1), the top tier professional football league in France
• Scottish League One, the third tier of football in Scotland
• Thai League 1, the top tier in Thailand
• USL League One, a third-tier soccer league in the United States

Rugby

• League 1 (rugby league), the third tier of rugby league in Europe
• National League One, the third tier of rugby union in England

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