RFL League One

League One
SportRugby league
Founded
  • 2003 (2003) (as National League 2)
  • 2009 (2009) as (Championship 1)
  • 2015 (2015) (as League 1)
  • 2022 (2022) (as League One)
Ceased2025 (merged with Betfred Championship)
No. of teams10
Country
Last
champion
North Wales Crusaders (2nd title)
Most titles Dewsbury Rams (3 titles)
Level on pyramid3
Promotion toChampionship
Domestic cupsChallenge Cup
1895 Cup
Official websiteLeague One

The Rugby Football League's League One (known as the Betfred League One) was the third-highest division of rugby league in Britain. It was also the lowest level of professional rugby league in Britain.

Introduced in 2003 as National League 2 it was the first time British rugby league had a third tier since the old Third and Second Divisions merged in 1998. The league was rebranded as Championship 1 in 2009, then League 1 in 2015, and League One in 2022.

The league was disbanded at the conclusion of 2025 due to the merger of the Championship and League One for the 2026 season.