A by-election was held for the Australian House of Representatives seat of Kooyong on 24 August 1910. This was triggered by the resignation of Commonwealth Liberal Party (CLP) MP William Knox.
The election was won by CLP candidate Robert Best.
| Kooyong by-election, 1910[1] | |||||
|---|---|---|---|---|---|
| Party | Candidate | Votes | % | ±% | |
| Liberal | Robert Best | 11,925 | 55.5 | -0.8 | |
| Independent Liberal | Alfred Lumsden | 8,214 | 38.2 | -5.5 | |
| Labor | Edward Erson | 1,363 | 6.3 | +6.3 | |
| Total formal votes | 21,502 | 98.8 | |||
| Informal votes | 253 | 1.2 | |||
| Turnout | 21,755 | 56.7 | |||
| Liberal hold | Swing | +2.4 | |||