| Country: | New South Wales |
| Type: | parliamentary |
| Ongoing: | no |
| Election Date: | 21 May 1927 |
| Vote Type: | Popular |
| Image1: | Portrait of Archdale Parkhill - Sidney Riley (cropped).jpg |
| Candidate1: | Archdale Parkhill |
| Party1: | Nationalist Party (Australia) |
| Popular Vote1: | 22,583 |
| Percentage1: | 55.8% |
| Swing1: | 24.3pp |
| Candidate2: | William Fell |
| Party2: | Independent Nationalist |
| Popular Vote2: | 7,477 |
| Percentage2: | 18.5% |
| Swing2: | 18.5pp |
| MP | |
| Before Election: | Granville Ryrie |
| Before Party: | Nationalist Party (Australia) |
| After Election: | Archdale Parkhill |
| After Party: | Nationalist Party (Australia) |
| Election Name: | 1927 Warringah by-election |
| 2Blank: | TPP swing |
| 2Data1: | 10.5pp |
| 1Data1: | 69.6% |
| 1Blank: | TPP |
| 1Data3: | 30.4% |
| 2Data3: | 10.5pp |
| Candidate3: | Ambrose O'Gorman |
| Party3: | Australian Labor Party |
| Popular Vote3: | 4,285 |
| Percentage3: | 10.6% |
| Swing3: | 1.5pp |
A by-election was held for the Australian House of Representatives seat of Warringah on 21 May 1927. This was triggered by the resignation of Nationalist MP Sir Granville Ryrie to become Australian High Commissioner to the United Kingdom.
The by-election was won by Nationalist candidate Archdale Parkhill.