The 1891 New South Wales colonial election was held in the then colony of New South Wales between 17 June to 3 July 1891. This election was for all of the 141 seats in the New South Wales Legislative Assembly and it was conducted in 35 single-member constituencies, 20 2-member constituencies, 10 3-member constituencies and nine 4-member constituencies, all with a first past the post system. Part 1 of the Electoral Act of 1880 set the qualification for election on "every male subject of Her Majesty of the full age of twenty-one years and absolutely free being a natural born or naturalized subject". Seven seats were uncontested. The previous parliament of New South Wales was dissolved on 6 June 1891 by the Governor, The Earl of Jersey, on the advice of the Premier, Sir Henry Parkes.

The premier of New South Wales is the head of government in the state of New South Wales, Australia. The Government of New South Wales follows the Westminster Parliamentary System, with a Parliament of New South Wales acting as the legislature. The premier is appointed by the Governor of New South Wales, and by modern convention holds office by their ability to command the support of a majority of members of the lower house of Parliament, the Legislative Assembly.