| Country: | Queensland |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 12 December 1936 |
| Vote Type: | Popular |
| Image1: | Bill Riordan 1940s.png |
| Candidate1: | Bill Riordan |
| Party1: | Australian Labor Party |
| Popular Vote1: | 19,111 |
| Percentage1: | 47.4% |
| Swing1: | 12.3pp |
| Candidate2: | Jim Boyd |
| Party2: | Independent Labor (Australia) |
| Popular Vote2: | 13,223 |
| Percentage2: | 32.8% |
| Swing2: | 32.8pp |
| MP | |
| Before Election: | Darby Riordan |
| Before Party: | Australian Labor Party |
| After Election: | Bill Riordan |
| After Party: | Australian Labor Party |
| Election Name: | 1936 Kennedy by-election |
| 1Data2: | 42.5% |
| 2Blank: | TPP swing |
| 2Data1: | 6.4pp |
| 2Data2: | 42.5pp |
| 1Data1: | 57.5% |
| 1Blank: | TPP |
| Candidate3: | Jim Slater |
| Party3: | Communist Party of Australia |
| Popular Vote3: | 4,459 |
| Percentage3: | 11.1% |
| Swing3: | 8.8pp |
A by-election was held for the Australian House of Representatives seat of Kennedy on 12 December 1936. This was triggered by the death of Labor MP Darby Riordan.
The by-election was won by the Labor candidate, Riordan's nephew Bill.