| Election Name: | 1911 North Sydney by-election |
| Before Party: | Commonwealth Liberal Party |
| Party1: | Commonwealth Liberal Party |
| Country: | Australia |
| Popular Vote1: | 11,687 |
| Swing1: | 7.3 |
| Candidate2: | Stephen O'Brien |
| Party2: | Labour |
| Popular Vote2: | 4,437 |
| Swing2: | 6.1 |
| MP | |
| Before Election: | George Edwards |
| After Election: | Granville Ryrie |
| Ongoing: | no |
| After Party: | Commonwealth Liberal Party |
| Percentage2: | 27.5% |
| Percentage1: | 72.5% |
| Candidate1: | Granville Ryrie |
| Registered: | 39,550 |
| Seats For Election: | The North Sydney seat in the House of Representatives |
| Type: | Parliamentary |
| Previous Election: | 1910 Australian federal election |
| Previous Year: | 1910 |
| Election Date: | 11 March 1911 |
| Next Election: | 1913 Australian federal election |
| Next Year: | 1913 |
| Turnout: | 16,210 (41.0%) |
| Colour2: | DE3533 |
A by-election was held for the Australian House of Representatives seat of North Sydney on 11 March 1911. This was triggered by the death of Liberal MP George Edwards.
The by-election was won by Liberal candidate Granville Ryrie.