| Country: | Western Australia |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 16 November 1940 |
| Vote Type: | Popular |
| Image1: | Herbert Johnson.png |
| Candidate1: | Herbert Johnson |
| Party1: | Australian Labor Party |
| Popular Vote1: | 18,228 |
| Percentage1: | 51.4% |
| Swing1: | 48.6pp |
| Candidate2: | Frederick Lee |
| Party2: | United Australia Party |
| Popular Vote2: | 14,382 |
| Percentage2: | 40.5% |
| Swing2: | 40.5pp |
| MP | |
| Before Election: | Albert Green |
| Before Party: | Australian Labor Party |
| After Election: | Hebert Johnson |
| After Party: | Australian Labor Party |
| Election Name: | 1940 Kalgoorlie by-election |
| 1Data2: | 45.4% |
| 2Blank: | TPP swing |
| 2Data1: | 45.4pp |
| 2Data2: | 45.4pp |
| 1Data1: | 54.6% |
| 1Blank: | TPP |
A by-election was held for the Australian House of Representatives seat of Kalgoorlie on 16 November 1940. This was triggered by the death of Labor MP Albert Green.
The by-election was won by Labor candidate Herbert Johnson.