The National Athletics League comprises two levels involving 32 clubs. At the top of the NAL is the Premiership involving 8 clubs. The second level is the Championship Division which involves 24 clubs, divided into North, South, East and West regional groups, each containing 6 clubs.
Premiership teams will take part in three fixtures, while the Championship teams take part in four. The last of these Championship fixtures will be a Promotion Match, with the top two from each regional group going forward to fight for promotion.
From that season-ending match, the top two teams will be promoted to the Premiership for 2026.
Full fixture details for 2025 can be found here.
| National Athletics League Divisional Structure | ||
| Premiership Division | Championship Division North | Championship Division East |
| Birchfield Harriers | City of Liverpool AC | Belgrave Harriers |
| City of Sheffield & Dearne AC | City of York AC | Blackheath & Bromley AC |
| Glasgow Jaguars | Notts AC | Chelmsford AC |
| Harrow AC | Sale Harriers Manchester | Havering AC |
| Shaftesbury Barnet Harriers | Trafford AC | Herne Hill Harriers |
| Thames Valley Harriers | Herts Phoenix AC | |
| Woodford Green & Essex Ladies | ||
| Windsor, Slough, Eton & Hounslow | Championship Division South | Championship Division West |
| Bournemouth AC | Basingstoke & Mid Hants AC | |
| City of Portsmouth AC | Cardiff AAC | |
| Crawley AC | Swansea Harriers | |
| Kingston AC & Poly | Winchester and District AC | |
| Southampton AC | Yate & District AC | |
| Tonbridge AC | Yeovil Olympiads | |