| Country: | Tasmania |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 15 February 1964 |
| Vote Type: | First preference |
| Image1: | AdrianGibson1964.jpg |
| Candidate1: | Adrian Gibson |
| Party1: | Liberal Party of Australia |
| Popular Vote1: | 16,953 |
| Percentage1: | 51.1% |
| Swing1: | 0.2pp |
| Candidate2: | Donald Finlay |
| Party2: | Australian Labor Party |
| Popular Vote2: | 14,367 |
| Percentage2: | 43.3% |
| Swing2: | 4.1pp |
| 1Blank: | TPP |
| 2Blank: | TPP swing |
| 1Data1: | 55.3% |
| 2Data1: | 2.11pp |
| 1Data2: | 44.7% |
| 2Data2: | 2.11pp |
| MP | |
| Before Election: | Athol Townley |
| Before Party: | Liberal Party of Australia |
| After Election: | Kevin Newman |
| After Party: | Adrian Gibson |
A by-election for the Australian House of Representatives seat of Denison was held on 15 February 1964. This was triggered by the death of Liberal MP and former Defence Minister Athol Townley.
The by-election was won by Liberal candidate Adrian Gibson.