| Election Name: | 1935 Fawkner by-election |
| Country: | Australia |
| Type: | Parliamentary |
| Ongoing: | no |
| Previous Election: | 1934 Australian federal election |
| Previous Year: | 1934 |
| Election Date: | 17 August 1935 |
| Next Election: | 1937 Australian federal election |
| Next Year: | 1937 |
| Turnout: | 41,973 (87.4%) |
| Seats For Election: | The Fawkner seat in the House of Representatives |
| Candidate1: | Harold Holt |
| Party1: | United Australia Party |
| Popular Vote1: | 24,594 |
| Percentage1: | 59.9% |
| Swing1: | 6.6 |
| Candidate2: | Don Cameron |
| Party2: | Australian Labor Party |
| Popular Vote2: | 16,433 |
| Percentage2: | 40.1% |
| Swing2: | 12.4 |
| MP | |
| Before Election: | George Maxwell |
| Before Party: | United Australia Party |
| After Election: | Harold Holt |
| After Party: | United Australia Party |
A by-election was held for the Australian House of Representatives seat of Fawkner on 17 August 1935. This was triggered by the death of United Australia Party (UAP) MP George Maxwell.
The by-election was won by UAP candidate and future Prime Minister Harold Holt.