| Competition | National League Division One |
| Season | 1950 |
| No. of competitors | 9 |
| Champion | Wembley Lions |
The 1950 National League Division One was the fifth post-war season of the highest tier of motorcycle speedway in Great Britain. Bristol Bulldogs joined the league. Wembley Lions won the National League for the fifth time.
| Team | PL | W | D | L | Pts |
| Wembley Lions | 32 | 24 | 0 | 8 | 48 |
| Belle Vue Aces | 32 | 19 | 0 | 13 | 38 |
| Wimbledon Dons | 32 | 17 | 1 | 14 | 35 |
| New Cross Rangers | 32 | 16 | 1 | 15 | 33 |
| West Ham Hammers | 32 | 16 | 0 | 16 | 32 |
| Bradford Tudors | 32 | 16 | 0 | 16 | 32 |
| Bristol Bulldogs | 32 | 15 | 0 | 17 | 30 |
| Birmingham Brummies | 32 | 12 | 0 | 20 | 24 |
| Harringay Racers | 32 | 8 | 0 | 24 | 16 |
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