The 2021 National Conference League was the 36th season of the National Conference League, the top league for British amateur rugby league clubs.
 
Due to the COVID-19 pandemic the tournament had a temporary restructure from its traditional four tiers involving small local round robins across seven areas with the winners and runners-up of each group, as well as a further two teams, entering a playoff system cumulating in one grand final for all four divisions.

Group A
Askam withdrew from the league during the middle of the season.

Group B

Group C

Group D

Group E
Gateshead Storm withdrew from the league during the middle of the season.

Group F

Group G

Playoffs

Round of 16
Thatto Heath Crusaders 74-6 Kells
West Brow Hornets 60-12 Leigh Miners Rangers
Siddal 20-8 West Hull
Hunslet Club Parkside 32-12 Rochdale Mayfield
Normanton Knights 22-32 Underbank Rangers
Crossfield 20-42 Pilkington Recs
West Bowling 28-8 Dewsbury Moor Maroons
Heworth 34-38 Lock Lane

Quarter Finals
Thatto Heath Crusaders 14-12 Siddal
Pilkington Recs 11-0 Lock Lane
Underbank Rangers 0-42 Hunslet Club Parkside
Wath Brow Hornets 18-8 West Bowling

Semi Finals
Thatto Heath Crusaders 18-16 Hunslet Club Parkside
Wath Brow Hornets 44-8 Pilkington Recs

Grand Final
Thatto Heath Crusaders 18-10 Wath Brow Hornets

References

National Conference League seasons
2021 in English rugby league