2025 RFL League One
| 2025 Betfred League One | |
|---|---|
| League | League One |
| Duration | 23 February – 12 October 2025 |
| Teams | 11 (10 from 2 April) |
| 2025 | |
| Withdrew | Cornwall |
The 2025 RFL League One is a professional rugby league football competition played in the United Kingdom and the third tier of the sport for Rugby Football League (RFL) affiliated clubs. The sponsors for the league are the bookmakers, Betfred and the league continues to be known as the Betfred League One.
Eleven teams were due to compete in the league playing 20 matches each over 22 rounds in the regular season. On 2 April, after four rounds had been played, Cornwall announced that the club were withdrawing from the league with immediate effect and would not be fulfilling their remaining fixtures.
Cornwall's membership of the RFL was terminated on 2 May and the club's three results for 2025 expunged. The competition will continue as a 10 club league with each team playing 18 games.