| 1912 Five Nations Championship | |
| Date: | 1 January - 8 April 1912 |
| Countries: | |
| Champions: | and |
| Matches: | 10 |
| Top Point Scorer: | Lloyd (18) |
| Previous Year: | 1911 |
| Previous Tournament: | 1911 Five Nations Championship |
| Next Year: | 1913 |
| Next Tournament: | 1913 Five Nations Championship |
The 1912 Five Nations Championship was the third series of the rugby union Five Nations Championship following the inclusion of France into the Home Nations Championship. Including the previous Home Nations Championships, this was the thirtieth series of the annual northern hemisphere rugby union championship. Ten matches were played between 1 January and 8 April. It was contested by England, France, Ireland, Scotland and Wales.