1939 Speedway National League
| League | National League Division One |
|---|---|
| Champions | None |
| No. of competitors | 7 |
| National Trophy | Belle Vue Aces & Wembley Lions |
| London Cup | Wimbledon Dons |
| British Speedway Cup | Belle Vue Aces |
| Highest average | Cordy Milne |
| Division/s below | National League (Div 2) |
The 1939 National League Division One was an eleventh and unfinished season of the highest tier of motorcycle speedway in Great Britain.