| Competition | National League Division One |
| Season | 1949 |
| No. of competitors | 8 |
| Champion | Wembley Lions |
The 1949 National League Division One was the fourth post-war season of the highest tier of motorcycle speedway in Great Britain. Birmingham Brummies joined the league. Wembley Lions won the National League for the fourth time.
| Team | PL | W | D | L | Pts |
| Wembley Lions | 42 | 28 | 1 | 13 | 57 |
| Belle Vue Aces | 42 | 24 | 0 | 18 | 48 |
| New Cross Rangers | 42 | 24 | 0 | 18 | 48 |
| West Ham Hammers | 42 | 23 | 0 | 19 | 46 |
| Odsal Boomerangs | 42 | 22 | 1 | 19 | 45 |
| Harringay Racers | 42 | 18 | 0 | 24 | 36 |
| Birmingham Brummies | 42 | 16 | 1 | 25 | 32 |
| Wimbledon Dons | 42 | 11 | 1 | 30 | 23 |
|
|||||||