| 1950 Five Nations Championship | |
| Date: | 14 January - 25 March 1950 |
| Countries: | |
| Count: | 11 |
| Grand Slam: | (4th title) |
| Triple Crown: | (8th title) |
| Matches: | 10 |
| Previous Year: | 1949 |
| Previous Tournament: | 1949 Five Nations Championship |
| Next Year: | 1951 |
| Next Tournament: | 1951 Five Nations Championship |
The 1950 Five Nations Championship was the twenty-first series of the rugby union Five Nations Championship. Including the previous incarnations as the Home Nations and Five Nations, this was the fifty-sixth series of the northern hemisphere rugby union championship. Ten matches were played between 14 January and 25 March. It was contested by England, France, Ireland, Scotland and Wales. Wales won their 11th title, and also the Grand Slam and the Triple Crown.
The teams involved were: