A by-election was held for the New South Wales Legislative Assembly electorate of Eastern Division of Camden on 15 March 1859 because Robert Owen's seat was declared vacant on his acceptance of an appointment as a judge of the District Court, filling the position created by the resignation of John Hargrave. The Illawarra Mercury reported that the nomination of John Tighe was intended to cause one week's delay before Hargrave could take his seat.
|3 March 1859||Robert Owen's seat declared vacant.|
|5 March 1859||Writ of election issued by the Speaker of the Legislative Assembly.|
|15 March 1859||Nominations|
|21 March 1859||Polling day|
|26 March 1859||Return of writ|
|John Hargrave (elected)||638||99.7|
|Total formal votes||640||100.0|
- "Writ of election: eastern division of Camden". New South Wales Government Gazette. No. 38. 8 March 1859. p. 542. Retrieved 19 June 2019 – via Trove.
- "East Camden election: the polling". Illawarra Mercury. 24 March 1859. p. 2. Retrieved 2 September 2020 – via Trove.
- "Mr Robert Owen (1799-1878)". Former Members of the Parliament of New South Wales. Retrieved 11 March 2019.
- Green, Antony. "1859 East Camden by-election". New South Wales Election Results 1856-2007. Parliament of New South Wales. Retrieved 19 June 2019.
- Green, Antony. "1858 Camden East". New South Wales Election Results 1856-2007. Parliament of New South Wales. Retrieved 25 February 2021.