1921 West Sydney by-election
A by-election was held for the Australian House of Representatives seat of West Sydney on 3 September 1921. This was triggered by the death of Labor MP T. J. Ryan.
The by-election was won by Labor candidate William Lambert.
Results
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Labor | William Lambert | 7,857 | 57.3 | -14.9 | |
| Nationalist | Alfred Henry | 5,237 | 38.2 | +10.4 | |
| Independent Labor | William McCristal | 430 | 3.1 | +3.1 | |
| Taxpayers' Association | John Powell | 186 | 1.4 | +1.4 | |
| Total formal votes | 13,710 | 95.8 | |||
| Informal votes | 606 | 4.2 | |||
| Turnout | 14,316 | 45.3 | |||
| Two-party-preferred result | |||||
| Labor | William Lambert | 59.6 | -12.6 | ||
| Nationalist | Alfred Henry | 40.4 | +12.6 | ||
| Labor hold | Swing | -12.6 | |||