| Country: | Tasmania |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 14 December 1929 |
| Vote Type: | First preference |
| Image1: | Charles William Frost.jpg |
| Candidate1: | Charles Frost |
| Party1: | Australian Labor Party |
| Popular Vote1: | 9,615 |
| Percentage1: | 44.5% |
| Swing1: | 44.5pp |
| Candidate2: | Archibald Blacklow |
| Party2: | Nationalist Party (Australia) |
| Popular Vote2: | 5,003 |
| Percentage2: | 23.2% |
| Swing2: | 0.2pp |
| 1Blank: | TPP |
| 2Blank: | TPP swing |
| 1Data1: | 51.9% |
| 2Data1: | 51.9pp |
| 1Data2: | 48.1% |
| 2Data2: | 3.0pp |
| MP | |
| Before Election: | William McWilliams |
| Before Party: | Independent politician |
| After Election: | Charles Frost |
| After Party: | Australian Labor Party |
| Image3: | Alfred Seabrook.jpg |
| Candidate3: | Alfred Seabrook |
| Party3: | Nationalist Party (Australia) |
| Popular Vote3: | 4,675 |
| Percentage3: | 21.7% |
| Swing3: | 21.7pp |
A by-election was held for the Australian House of Representatives seat of Franklin on 14 December 1929. This was triggered by the death of independent MP William McWilliams.
The by-election was won by Labor candidate Charles Frost.