| League | National League |
|---|---|
| No. of competitors | 7 |
| Champions | Wimbledon Dons |
| National Trophy | Wimbledon Dons |
| Highest average | Barry Briggs |
| Division/s below | National League (Div 2) 1956 Southern Area League |
The 1956 National League Division One was the 22nd season and eleventh post-war season of the highest tier of motorcycle speedway in Great Britain.[1]