1950 Speedway National League Division Three
The 1950 National League Division Three was the fourth season of British speedway's National League Division Three
The league was reduced from 13 teams to 10. Halifax Dukes, Plymouth, Yarmouth and Hanley had all moved up to Division Two whilst Hastings Saxons dropped out. The two new sides were Aldershot Shots and St Austell Gulls whilst Tamworth changed their nickname from 'Hounds' to 'Tammies'.
Oxford Cheetahs, who had finished bottom of the table during their inaugural league season in 1949, rose spectacularly up the league to win the title. The Oxford team was made up from an entirely new set of riders including Harry Saunders, signed as captain from Tamworth for £750, Pat Clark from Rayleigh for £250, Bill Osborne from Walthamstow, Raymond Buster Brown from Wembley and Eric Irons from Cradley.
Ken Middleditch of Poole topped the averages.
National Trophy Stage Three
- For Stage Two - see Stage Two
- For Stage Three - see Stage Three
Third Division Qualifying First round
| Date | Team one | Score | Team two |
| 10/04 | Liverpool | 50-57 | Oxford |
| 06/04 | Oxford | 76-32 | Liverpool |
Third Division Qualifying Second round
| Date | Team one | Score | Team two |
| 22/04 | Swindon | 60-47 | Oxford |
| 20/04 | Oxford | 62-46 | Swindon |
| 10/04 | Exeter | 65-41 | Leicester |
| 07/04 | Leicester | 66-42 | Exeter |
| 19/04 | Tamworth | 71-37 | St Austell |
| 18/04 | St Austell | 48-58 | Tamworth |
| 20/04 | Poole | 51-57 | Aldershot |
| 19/04 | Aldershot | 61-45 | Poole |
| 21/04 replay | Leicester | 53-55 | Exeter |
| 17/04 replay | Exeter | 62-45 | Leicester |
Third Division Qualifying semifinals
| Date | Team one | Score | Team two |
| 05/05 | Exeter | 54-53 | Oxford |
| 27/04 | Oxford | 83-24 | Exeter |
| 03/05 | Tamworth | 67-41 | Aldershot |
| 01/05 | Aldershot | 63-44 | Tamworth |
Qualifying final
First leg'''Second leg'''
Riders' Championship
Pat Clark won the National League Division Three Rider's Championship, in front of 28,000 spectators. The final was held at Walthamstow Stadium on 23 October.| Pos. | Rider | Pts |
| 1 |  Riders & final averagesAldershot
|