1879 Lachlan colonial by-election

A by-election was held for the New South Wales Legislative Assembly electorate of The Lachlan on 10 January 1879 because James Watson was appointed Colonial Treasurer in the third Parkes ministry. Such ministerial by-elections were usually uncontested however on this occasion a poll was required in Canterbury (Sir Henry Parkes) and The Lachlan. Both were comfortably re-elected. The other 5 ministers were re-elected unopposed.

Result
James Watson was appointed Colonial Treasurer in the third Parkes ministry.