Robertson ministry (1877)

Fourth Robertson ministry
17th cabinet of the Colony of New South Wales
Premier John Robertson and the Colony of New South Wales (1863–1900)
Date formed	17 August 1877 (1877-08-17)
Date dissolved	17 November 1877 (1877-11-17)
People and organisations
Head of state	Queen Victoria (represented by Sir Hercules Robinson)
Head of government	John Robertson
No. of ministers	9
Member party	unaligned
Status in legislature	Minority government
Opposition party	unaligned
Opposition leader	Henry Parkes James Farnell
History
Outgoing election	1877
Predecessor	Second Parkes ministry
Successor	Farnell ministry

The fourth Robertson ministry was the seventeenth ministry of the Colony of New South Wales, and was led by the Honourable John Robertson. It was the fourth of five occasions that Robertson led the Government. Robertson was elected in the first free elections for the New South Wales Legislative Assembly held in March 1856.

The title of Premier was widely used to refer to the Leader of Government, but not enshrined in formal use until 1920.

There was no party system in New South Wales politics until 1887. Under the constitution, ministers were required to resign to recontest their seats in a by-election when appointed. These by-elections are only noted when the minister was defeated; in general, he was elected unopposed.

This ministry covers the period from 17 August 1877 until 17 December 1877, when Robertson was defeated by James Farnell at the December 1877 election.