A by-election was held for the New South Wales Legislative Assembly electorate of Belmore on 13 May 1910. The by-election was triggered by the death of Edward William O'Sullivan. [1] O'Sullivan was elected as a Former Progressive but joined the Labour Party in 1909.
| Date | Event |
|---|---|
| 25 April 1910 | Edward O'Sullivan died. [1] |
| 29 April 1910 | Writ of election issued by the Speaker of the Legislative Assembly. [2] |
| 13 May 1910 | Nominations |
| 21 May 1910 | Polling day and 1910 Federal election |
| 7 June 1910 | Return of writ |
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Labour | Patrick Minahan | 1,589 | 74.6 | ||
| Liberal Reform | George Clarke | 525 | 24.6 | −5.6 | |
| Independent | James Jones | 17 | 0.8 | ||
| Total formal votes | 2,131 | 95.7 | −1.2 | ||
| Informal votes | 95 | 4.3 | +1.2 | ||
| Turnout | 2,226 | 27.6 [a] | −39.3 | ||
| Labour gain from Progressive Party (defunct) | |||||