West Bowling, Clock Face Miners and Barrow Island will all play in the National Conference League Division Three from next season.
The trio received overwhelming support to join the NCL from at least 84% of the votes cast from fellow NCL clubs.
Bradford outfit West Bowling return to the NCL after storming to the Yorkshire Men’s League title in 2016, while Barrow Island are also returning to the league after a successful period in the Cumbria Men’s League which saw them reach the Premier Division final this year.
Meanwhile, Clock Face Miners join the NCL for the first time.
The St Helens-based club have spent their recent years in the North West Men’s League Premier Division.
RFL Competition Officer Alan Smith said: “Thanks to the clubs for voting on the new applicants for 2017 in a timely manner.
“All three clubs received overwhelming support to join the NCL from at least 84% of the votes cast. Congratulations and welcome to West Bowling, Clock Face Miners and Barrow Island.