A by-election was held for the New South Wales Legislative Assembly electorate of Boorowa on 30 September 1899 because Kenneth Mackay (Protectionist) resigned to accept an appointment to the Legislative Council. [1]
| Date | Event |
|---|---|
| 15 September 1899 | Kenneth Mackay resigned from the Legislative Assembly. [1] |
| 16 September 1899 | Writ of election issued by the Speaker of the Legislative Assembly. [2] |
| 23 September 1899 | Nominations |
| 30 September 1899 | Polling day |
| 9 October 1899 | Return of writ |
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Labour | Niels Nielsen (elected) | 539 | 53.0 | +15.2 | |
| Protectionist | George Waddell | 478 | 47.0 | −15.2 | |
| Total formal votes | 1,017 | 97.8 | −0.9 | ||
| Informal votes | 23 | 2.2 | +0.9 | ||
| Turnout | 1,040 | 45.6 | −15.4 | ||
| Labour gain from Protectionist | Swing | +15.2 | |||