A by-election was held for the New South Wales Legislative Assembly electorate of The Hastings and Manning on 5 April 1890 because of the resignation of Charles Roberts to visit England.
| Date | Event | |
|---|---|---|
| 13 March 1890 | Charles Roberts resigned.[1] | |
| 14 March 1890 | Writ of election issued by the Speaker of the Legislative Assembly.[2] | |
| 31 March 1890 | Nominations | |
| 5 April 1890 | Polling day | |
| 26 April 1890 | Return of writ |